Given
Jacinda made 16 baskets
Greta made 4 baskets
Let x represent the number of times more than the number of baskets Greta made that Jacinda made.
x can be obtained by dividing the number of baskets Jacinda made by the number of baskets Greta made:

Substituting the given values:

Simplifying into an equation:

Hence, the equation for the problem is:
4x = 16