SOLUTION: the numbers are in the ratio of 3:4:5. If the middle number is 18 what is the sum of the 3 numbers?
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Question 1063779: the numbers are in the ratio of 3:4:5. If the middle number is 18 what is the sum of the 3 numbers?
Answer by math_helper(2461) (Show Source): You can put this solution on YOUR website!
3:4 = x:18 —> 3/4 = x/18 —> x = 18*3/4 = 54/4 = 13.5
4:5 = 18:y —> 4/5 = 18/y —> y = 18*5/4 = 90/4 = 22.5
13.5:18:22.5 satisfies the ratio, and the sum is
Or we could've just done: 18*3/4 + 18 + 18*5/4 = 54.
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