This evening, Coleman's men will take on Moldova, who sit at the bottom of the group with just two points to their name.
"I said we had four finals to keep our hopes alive," Sky Sports News quotes Bale as saying. "If we win all four we'll have a great chance of top spot, and if not we'll get into the playoffs.
"One down, three to go. This is important too, we'll be going into the match confident and prepared very well. We know they'll make it difficult but we'll do everything to get the points and put ourselves in an even better position.
"If I didn't think we could [qualify] I wouldn't be here. We all still believe we can do it. That's the most important part."
Bale has scored four goals in Wales's qualifying campaign so far.