Move objects toward center If I have multiple objects surrounding the center of the scene, how would I move all of them toward the center X units?

Example:
I have 4 gears in my scene lined up 3 units from the center in each direction. I would like to move them all towards the center without changing their size/proportions X units, until they begin to touch.

How would I go about moving all of these objects the same distance towards the center without distorting them?
Check Manipulate Center Points, select all, press S and scale them down.

You can change Pivot Point to 3D cursor if you want.