It's not that big a deal for most cables that can be used in both single ended and balanced configurations to have an XLR applied to one end, and an RCA to the other. Keep in mind though that it will NOT function as a balanced cable this way, though it will fit both your sockets without being degraded by an adapter.
XLR to RCA?
Is there a way to use XLR cables with RCA inputs? An adapter or something? I know I can use RCA cables to XLR inputs through BAT adapter, but what about this way?