How do i draw a bar diagram to represent 6 times more than $4

What value of x will make the triangles similar by the sss similarity theorem?

Just tell me how to set up the equation.

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?