The purpose of this paper is to present some new contraction mappings via control functions.
In addition, some fixed point results for (Q, a, q,Y) contraction, rational (Q, a, q,Y) contraction and
almost (Q, a, q,Y) contraction mappings are obtained. Moreover, under contraction mappings of
types (I), (II), and (III) of (Q, q,Y)u0 , several fixed circle solutions are provided in the setting of a
G-Metric space. Our results extend, unify, and generalize many previously published papers in this
direction. In addition, some examples to show the reliability of our results are presented. Finally, a
supporting application that discusses the possibility of a solution to a nonlinear integral equation is
incorporated.