Discover the meaning of the term Fal-ḍabṭa (فالضابطة) in Islamic vocabulary.
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Updated on 11 April 2026 at 1:05 AM
📖 1 min readIn the extraction of the unknown using the rule of three in matters related to transactions, you multiply the number appearing at the end of the question by a number of a different kind, and you divide the product by the number of its own kind; the quotient is then the desired result. Thus, in the last example, the number of two ratls is multiplied by the number of three dirhams, and the product of six is divided by the number of five ratls; the quotient is the desired result. This is a summary of what is contained in this chapter. O Allah, make calculation easy for me on the Day of Judgment, through the intercession of the four proportionals, the summary of the beloved ones, meaning the beloved ones of the Messenger of Allah, may Allah bless him and grant him peace.