x represents the height of the parallelogram, and also represents the width. As you can see, the parallelogram is longer than the height and width. 5x represents this length. In words, the parallelogram is 5 times longer than it is wide (or 5 times longer than it is high / thick).
The coefficient only represents the scale of the object. The ratio of the volume does not change.., the only thing that changes is how big or small the object is.
