algebra
posted by Alaska Diamond .
I need help figuring this out.
If an object 3.9 feet tall casts a shadow 11.7 feet tall. How tall would the shadow be if the object were 17.4 feet tall?
please show me step by step for me to understand.
thank you so much

Set up a proportion. Cross multiply and solve for x.
3.9/11.7 = 17.4/x
3.9x = 203.58
x = 52.2 feet