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12 x
11 9
what is the answer to this proportion?
 Apr 9, 2014
 #1
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12 x
11 9
what is the answer to this proportion?

So we have
12 / 11 = x / 9
Cross-multiplication is the way to solve these problems...This gives us.....

12 * 9 = 11 * x ...thus.....
108 = 11 x........Now divide by 11 on both sides
108 / 11 = x
So, x ≈ 9.818

(Note, that we could have set up the proportion as (12 / x = 11 / 9).....the result would have been the same !!! (Check this for yourself.)
 Apr 9, 2014

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