You can also move the seat forward from 'centre' a couple of inches to increase your reach if need be;
Actually - Depending on the kind of seat-post (or seat-clip) it's even sometimes possible to rotate the seat-post 180° and position the saddle even further forward (this is done 'as standard' on a Brompton with a little extra part);

I would imagine you'll be fine though - the 'cockpit' (ie distance between seat and bars) on most folding bikes is usually pretty accommodating.