Simple answer: yes.
More complex answer: the 8 ohm driver will draw twice as much power as the 16 ohm drivers. As they are all in the same internal air volume, they will interfere with each other to some extent. With luck, this won't be a problem. On the plus side, if you mount the 8 ohm driver in the center position, it forms a 16-8-16 array, which should work fairly well. I'd try it.