Using monitor out phone to xlr

At my church, I want to take one of the 1/4" female monitor sends and run it through one of the xlr cables to get to the stage.  Then I want to convert it back so I can plug it into a monitor amp on stage to drive a smaller monitor.  Can I buy a simple converter to go male phone to female xlr on the mixer side then male xlr to male phone on the stage side?  Or, do I need to convert the phone to low Z before I attach to the xlr and then covert back to hi z on the stage?
 
Thanks much.
 
Rimshot

OK thanks.  How would I know if the phone is balanced or unbalanced? 

What I do if this is going to stay permanent,  is remove the XLR from an unused snake channel and add a TRS 1/4" jack at the mixer end. They do make adapters but this is a much better way.
At the stage end you can make or by a cable that is XLR ( snake end) and 1/4 TRS to plug into the monitor. Assuming it's a powered monitor.

If the mixers Aux sends are unbalanced ( Our was, a Yamaha 1202) then you go ahead and try it anyways and see if you get a bad hum on stage. Sometimes you get lucky and if the Monitor has a balanced input it will work fine.
If not,  you will need to use some kind of convertor/ DI box or. I used a Yamaha EQ which has both balanced and unbalanced in and out at the mixer end.

Most  1/4" in and out jacks will say "Balanced" if they are. If nothing is written then assume they aint.
You will need to look in the manual spec sheet.