Let G(V, E) be a graph with vertex set V and edge set E. A radio geometric mean labeling of a connected graph G is a one to one map from the vertex set V (G) to the set of natural numbers N such that for two distinct vertices u and v, where d(u, v) represents the shortest distance between the vertices u and v and diam(G) represents the diameter of G . Based on the concept of radio geometric mean labeling, a new graph labeling called radio antipodal geometric mean labeling is being introduced in this paper. A radio antipodal geometric mean labeling of a graph G is a mapping from the vertex set V (G) to the set of natural numbers N such that for two distinct vertices u and, then the vertices u and v can be given the same label and if d(u, v) = diam(G) then the vertices u and v should be assigned different labels. The radio antipodal geometric mean number of f , ragmn(f ) is the maximum number assigned to any vertex of G. The radio antipodal geometric mean number of G, ragmn(G) is the minimum value taken over all radio antipodal geometric mean labeling f of G. In this paper, the radio antipodal geometric mean number of certain ladder related graphs have been investigated.