SOLUTION: A rectangle has a length of 3 and a width of 1.what is the width of a similar rectangle with a length of 12

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Question 820743: A rectangle has a length of 3 and a width of 1.what is the width of a similar rectangle with a length of 12
Answer by jhunjiro(67) About Me  (Show Source):
You can put this solution on YOUR website!
ratio L:W
3%3A1 =+3%2F1+
+12%3AW+=+12%2FW

equate the two ratio
+3%2F1=12%2FW
simplify
+3W=12
+3W%2F3=12%2F3
+W=4+