number of related products on one line

Hello, Now I have three related products on one line on a single product page. The website is Laura.hagmeijer.nl The precut category is cupcakes and the product page is tnrtelette small. The image of that page is very ugly. After a morning of searching I cannot find a way to have 5 or 6 related products on one line.I tried a number oof plugins but no result. Is it possible to het six related products on a line just like a normal shop page? Kind regards Hans Hagmeijer