Posted by domonique on Monday, June 1, 2009 at 7:02pm.
in a class, the ratio of boys to girls is 3/4. if there are 12 boys in the class, how many girls are there

math  leslie, Monday, June 1, 2009 at 7:05pm
for every 3 boys there is 4 girls
divide 12 by 3 and the answer is 4
multiply 4 by 4
16 This will be your answer

math  Ms. Sue, Monday, June 1, 2009 at 7:05pm
Set up a proportion. Let x = the number of girls.
3 / 4 = 12 / x
Cross multiply:
3x = 48
x = 16
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