You know that Tyler painted 
 square yards area with 3 gallons of paint and want to know many gallons of paint does it take to paint each square yard of wall. Then
 square yards area with 3 gallons of paint and want to know many gallons of paint does it take to paint each square yard of wall. Then
 square yards - 3 gallons
 square yards - 3 gallons
1 square yards - x gallons,
mathematically this is proportion:

Answer: it takes 
 gallons of paint to paint each square yard of wall.
 gallons of paint to paint each square yard of wall.