Finding the Fourth Proportional to 15,843.20, 21,826.87 and 13,185.99
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Solution
The fourth proportional to 15,843.20, 21,826.87 and 13,185.99 is: 18,166.09
Step by Step Solution
- Step 1: Write the proportion equation
15,843.20 : 21,826.87 = 13,185.99 : x - Step 2: Convert to fraction form
15,843.20/21,826.87 = 13,185.99/x - Step 3: Cross multiply
15,843.20x = 21,826.87 × 13,185.99 - Step 4: Simplify right side
15,843.20x = 287,808,856.59 - Step 5: Solve for x
x = 287,808,856.59/15,843.20 - Step 6: Final answer
x = 18,166.09
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.