Perspective - An art installation from Burning Man 2007. The letter "A" is six inches tall. The "E" is ten feet tall. This led me to a question, I was hoping someone could answer. 

If "A" is six inches tall and 10 feet from the camera,and "E" is ten feet tall, how far away do you place"E" to make the letters appear to be the same size from the cameras perspective?