Sathya, I believe this is a function of the pane layout in your skin. You would need to edit that file to create the panes you need. - thanks, Will Sugg

Yeah, Just like Will said, make a few changes on the skin file - create custom panes perhaps.  I would think that you do not want to put 10+ modules on the page horizontally because that would make the page width too wide. 

This is a 3panes version. Wrap them in one table so it would look consistant. I would even use existing panes instead of custom panes if you want to put only 3 modules horizontally.

Depending on what you want to accomplish, there might be better way.