Answers

2015-02-14T20:22:40+08:00

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Just make the ratio to a fraction form like this
3:7  = 3/7
and let x the unknown value
9:x = 9/x
 then perform the equation and find x
3/7 = 9/x
manipulating the equation
you will get x
x = 9(7)/3
so
x = 21
so the ratio form is become
3:7 = 9:21

I hope it helps to you !
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2015-02-14T21:06:33+08:00

This Is a Certified Answer

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
3:7=9:_
First find the multiples
6:14
9:21

Therefore the blank is 21. Hope this helps =)
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