Picture Riddle: How Many Yellow Triangles Will Balance The Scale?

From the second picture you can see that one circle is equal to 2 yellow cones

So putting this is the first balance, you can say that;

1 square = 3 yellow triangles.

In the last balance we have 2 squares so it would mean that 6 yellow triangles would be needed to balance it.

Hence answer = 6 yellow traingles