We investigate a Higgs-radion mixing scenario through a single radion photoproduction process pp. pgp. pRqX at the LHC where X represents the remnants of one of the initial protons. We consider high luminosity values of L-int = 200 fb(-1), 500 fb(-1) and 3000 fb(-1). We obtain bounds on the mixing parameter space by considering R -> gamma gamma, R -> W+W- and R -> ZZ decay channels of the radion as the signal. We also perform a similar analysis for a 100 TeV future proton-proton collider and compare its potential with that of the LHC.