On sunny day, a 5-foot red kangaroo casts a shadow that is 7 feet long. The shadow of a nearby eucalyptus tree is 35 feet long. How do you write and solve a proportion to find the height of the tree?
Let the height of the kangaroo be
Let the length of the shadow of the kangaroo be
Let the unknown height of the tree be
Let the length of the shadow of the tree be
The proportion is:
Substitute in the known values: