Aboy who is 3 feet tall can cast a shadow on the ground that is 7 feet long. how tall is a man who can cast a shadow that is 14 feet long? solve this problem by setting up a proportion. show your work.

Since the boy's shadow is 7 feet, and the mans shadow is 14 feet, the proportion of the boy to the man is 7/14, or 1/2 
1/2= 3/x
x/2=3            (multiply both sides by x)
x=6                (multiply both sides by 2)
The Mans height is 6 feet