document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1117506>Question 1117506</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In the gift shop of the History of Flight museum, Elisa bought a kit to make a model of a jet plane. The actual plane is 21 feet long with a wingspan of 17.5 feet. If the finished model will be 12 inches long, what will the wingspan be?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #732608 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=732608\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the actual plane is 21 feet long with a wingspan of 17.5 feet.\r<BR>\n" );
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document.write( "the finished model is 12 inches long.\r<BR>\n" );
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document.write( "the ratio of the wingspan to the length is 17.5 / 21.\r<BR>\n" );
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document.write( "if the finished model is 12 inches long, then the wingspan of the model would need tobe 17.5 / 21 * 12 = 10 inches.\r<BR>\n" );
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document.write( "now the ratio is preserved.\r<BR>\n" );
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document.write( "17.5 / 21 = 10 / 12.\r<BR>\n" );
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document.write( "cross multiply to get 17.5 * 12 = 21 * 10 which results in 210 = 210.\r<BR>\n" );
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document.write( "this indicates that the ratios are equivalent to each other.\r<BR>\n" );
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document.write( "you can also see that they're equivalent to each other by finding the least common multiple of each fraction.\r<BR>\n" );
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document.write( "17.5 / 21 = 10 / 12\r<BR>\n" );
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document.write( "multiply numerator and denominator of 10 / 12 by 1.75 / 1.75 and you get:\r<BR>\n" );
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document.write( "10 / 12 * 1.75 / 1.75 = 17.5 / 21.\r<BR>\n" );
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document.write( "this indicates the ratios of 17.5 / 21 and 10 / 12 are identical.\r<BR>\n" );
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