SOLUTION: If it takes 4 workers 15 months to build 10 houses. How many months will it take 3 workers to build 4 houses? They work at the same rate.

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Question 316243: If it takes 4 workers 15 months to build 10 houses. How many months will it take 3 workers to build 4 houses? They work at the same rate.
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
Set up a ratio
%284%2A15%29%2F10+=+%283%2Ax%29%2F4
60%2F10+=+%283%2F4%29x
6+%2A+%284%2F3%29+=+x
8+=+x