Jointly Proportional

Pronunciation: /dʒɔɪ prəˈpoʊr.ʃə.nl/ Explain

A variable z is jointly proportional to two other variables x and y if z is proportional to x and y taken one at a time. Example: z = 3xy.

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Manipulative 1 - Jointly Proportional Created with GeoGebra.


  1. McAdams, David E.. All Math Words Dictionary, joint proportion. 2nd Classroom edition 20150108-4799968. pg 104. Life is a Story Problem LLC. January 8, 2015. Buy the book
  2. Bettinger, Alvin K. and Englund, John A.. Algebra and Trigonometry. pg 58. International Textbook Company. January 1963. Last Accessed 8/8/2018. Buy the book

Cite this article as:

McAdams, David E. Jointly Proportional. 12/21/2018. All Math Words Encyclopedia. Life is a Story Problem LLC.

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Revision History

12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
8/7/2018: Initial version. (McAdams, David E.)

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