I would recommend to:
1. Visualize your data, e.g. using the graph builder. Use graphs to give you an idea in which direction the data leads you. Check for potential outliers as well.
2. Then try to find an adequate model in the "Fit Model"-plattform. Make sure to set all factors in the model to mixture using the little red triangle next to "Attributes" in the fit model plattform. The JMP help gives an intro to the analysis of mixture experiments: A Chemical Mixture Example
Overall you might want to read about Design of Experiments for Formulations (Mixture Designs) for future studies if you are not already aware of that topic.
Hope that helps,
Sebastian