Volume of right rectangular prism = Length x Width x Height
Using the given dimensions, we can write:
Volume of right rectangular prism = 3 x 12 x 5 = 180 cubic inches
Volume of oblique rectangular prism = Base Area x Height
Base Area = 4 x 9 = 36 square inches
So, Volume of oblique rectangular prism = 36 x 5 = 180 cubic inches
Thus, we can conclude that the two volumes are the same.