Lyman...
A jet engine's blades aren't there to propel the airplane forward (assuming we're talking strictly about a turbojet). They're called compressor blades because they compress the air then fuel is added and the air is ignited. The expansion of the fuel/air mixture is directed out the rear of the engine which produces the thrust that propels the airplane forward. A turbojet is really not related to a propeller.
Engine Pressure Variation - EPR
In extreme cases, the intake can produce well over half of the thrust of the exhaust.
Do you have a reference for that on a turbojet engine? - specifically where it says that it produces "well over half the thrust".
I'm assuming you're talking about ram effect. There can be a noticeable increase in thrust due to the compression of the air prior to entering the engine (ram effect) if the airplane is traveling at high speeds. But I'm unsure what you're trying to point out.