Given:
Height of hiker = 4 feet
Length of hiker's shadow = 8 feet
Length of tree's shadow = 27 feet
Let's find the height of the tree.
We have:
4 feet = 8 feet
x feet = 27 feet

Where x represents the height of the tree.
Let's solve for x.
Cross multiply:

Therefore, the height of the tree is 13.5 feet
ANSWER:
13.5 feet