figuring out mathematics

Question

You read online that a 15 ft by 20 ft brick patio would cost about $2,275 to have professionally installed. Estimate the cost of having a 12 by 25 ft brick patio installed

Answer 1

15 by 20 = 300 ft^2 cost 2275

15 by 25 is = 375 ft^2 cost more 1/12 more

x/2275 = 375/300 = 13/12

x = 2275(13)/12 = $2464.58