The price of a pumpkin is directly proportional to its weight If a pumpkin that weighs 15.0 pounds costs 3.25 how much will an 11.4 pound pumpkin cost?

Since a 15.0 pound pumpkin costs $3.25 that means that it costs $0.22 a pound. You can get that by $3.25/15.0=$0.22 so an 11.4 pound pumpkin will cost $2.51 (11.4x$0.22).