Question

the cost of building a new house is directly proportional to the number of square feet in the house if a 1500 square foot house costs $120,000 to build a 2,400 square foot house? the cost of building a 2,400 square foot is $

Answer 1

1500/120,000 = 2400/x
cross multiply
1500x = (120000)(2400)
1500x = 288,000,000
x = 288000000/1500
x = 192,000 <== cost of building 2400 sq ft