SOLUTION: The ratio of the sum of K and 12 to 15 is the same as the ratio of 30 to 25. What is K?

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Question 1144888: The ratio of the sum of K and 12 to 15 is the same as the ratio of 30 to 25. What is K?
Found 2 solutions by ikleyn, greenestamps:
Answer by ikleyn(52794)   (Show Source): You can put this solution on YOUR website!
.

You are given   = .


Hence,   = ,  which implies


    K + 12 =  = 6*3 = 18.


ANSWER.  K = 18 - 12 = 6.

Check it on your own.


Answer by greenestamps(13200)   (Show Source): You can put this solution on YOUR website!


Here is a slightly different path to the solution than shown by the other tutor.... Neither solution is any "better" than the other.


[simplify the fraction on the right]
[noting that 15 is a multiple of 5, write the fraction on the right as an equivalent fraction with denominator 15]
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