Given =
Two similar pyramid have base area of 12.2 cm² and 16 cm².
surface area of the larger pyramid = 56 cm²
find out the surface area of the smaller pyramid 
To proof =
Let us assume that the surface  area of the smaller pyramid be x.
as surface area of the larger pyramid is 56 cm²
Two similar pyramid have base area of 12.2 cm² and 16 cm².
by using ratio and proportion
we have
ratio of the base area of the pyramids : ratio of the surface area  of the pyramids

x = 12.2 ×56×
by solvingthe above terms 
we get
x =42.7cm²
Hence the surface area of the smaller pyramid be 42.7cm²
Hence proved