If the question is “am I towing more than the rig is designed for”, the 5K tow hitch is only one of the limiting factors. You need to consider the difference between the RV actual weight and GCVW. The lesser of that calculation and the tow hitch rating is your “rated” towing capacity.
Also, while weighting the loaded RV, get the back axle weight and compare it to the rated axle capacity. Do you have additional axle capacity to handle the tongue weight? (only a factor when using a trailer, nearly zero additional tongue weight when towing 4 down)