Choosing multiplexer to convert current to different voltage
I would go for a complete different approach: use a programmable gain aplifier (PGA) using the following circuit:  



The above edited picture is from the "PGA11x Zerø-Drift Programmable Gain Amplifier With Mux" datasheet. However, this PGA11x series cannot output 10V.  

You need to search for a PGA having these scope gains with a higher supply voltage rating (as you can search on that parameter and most PGA's can output close to rail-to-rail).