document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=66549>Question 66549</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use cross products to determine whether each of pair of ratios forms a proportion:\r<BR>\n" );
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document.write( "4/9, 12/27\r<BR>\n" );
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document.write( "Please explain how to solve this problem. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #47200 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=47200\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Use cross products to determine whether each of pair of ratios forms a proportion:\r<BR>\n" );
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document.write( "4/9, 12/27<BR>\n" );
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document.write( "You are checking the following equality:<BR>\n" );
document.write( "(4/9)=(12/27)<BR>\n" );
document.write( "You do this by cross multiplying as follows:<BR>\n" );
document.write( "4*27=108<BR>\n" );
document.write( "9*12=108<BR>\n" );
document.write( "Since the cross-products are equal the ratios are equal <BR>\n" );
document.write( "and they form a proportion.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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