Here you can easily solve the three-pronged approach. A distinction is made here in two types of rule of three, once the "normal" and then "inverted" rule of three. The difference you can see the problem and the examples.
These questions ask for the number of x units of size B, which are in the same relation to C units of A
10 construction workers digging 22 pits in a workday. How many pits dug in the same time 5 construction workers?
10 construction workers ≅ 22 pits
5 construction workers ≅ x pits
Formula: x = (C ⋅ B) / A, ie
x = (5 ⋅ 22) / 10 = 11, ie 11 pits
These questions ask for the number of x units of size B, the result with c units of A the same product