  We study Higgs-radion mixing in a warped extra dimensional model with
Standard Model fields in the bulk, and we include a fourth generation of chiral
fermions. The main problem with the fourth generation is that, in the absence
of Higgs-radion mixing, it produces a large enhancement in the Higgs production
cross-section, now severely constrained by LHC data. We analyze the production
and decay rates of the two physical states emerging from the mixing and
confront them with present LHC data. We show that the current signals observed
can be compatible with the presence of one, or both, of these Higgs-radion
mixed states (the $\phi$ and the $h$), although with a severely restricted
parameter space. In particular, the radion interaction scale must be quite low,
Lambda_\phi ~ 1-1.3 TeV. If m_\phi ~ 125 GeV, the $h$ state must be heavier
(m_h>320 GeV). If m_h ~ 125 GeV, the $\phi$ state must be quite light or close
in mass (m_\phi ~ 120 GeV). We also present the modified decay branching ratios
of the mixed Higgs-radion states, including flavor violating decays into fourth
generation quarks and leptons. The windows of allowed parameter space obtained
are very sensitive to the increased precision of upcoming LHC data. During the
present year, a clear picture of this scenario will emerge, either confirming
or further severely constraining this scenario.
