document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1173938>Question 1173938</A>: <I><SPAN STYLE=\"word-break: break-all;\"> At the swinging club there are 3 boys for every 4 girls. How many girls are there if there are 21 boys?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #799278 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13215)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=799278\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "The solution from the other tutor sets up the proportion as<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=21%2F3+=+x%2F4 ALIGN=MIDDLE  ALT=\"21%2F3+=+x%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "and solves that equation (proportion) to find x=28.<br><BR>\n" );
document.write( "That is of course valid.  However, the problem is more easily solved by setting up the proportion as<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%2F4+=+21%2Fx ALIGN=MIDDLE  ALT=\"3%2F4+=+21%2Fx\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "Then the problem is solved by looking at these as equivalent fractions; since 21 is 7 times 3, x has to be 7 times 4, or 28.<br><BR>\n" );
document.write( "-----------------------------------------------------<br><BR>\n" );
document.write( "Note to tutor @ikleyn --<br><BR>\n" );
document.write( "There is currently a typo in your response (21/7 instead of 21/3)<br><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );