Finding the Fourth Proportional to 86,624.63, 129,936.95 and 20,960.63
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Solution
The fourth proportional to 86,624.63, 129,936.95 and 20,960.63 is: 31,440.95
Step by Step Solution
- Step 1: Write the proportion equation
86,624.63 : 129,936.95 = 20,960.63 : x - Step 2: Convert to fraction form
86,624.63/129,936.95 = 20,960.63/x - Step 3: Cross multiply
86,624.63x = 129,936.95 × 20,960.63 - Step 4: Simplify right side
86,624.63x = 2,723,560,332.28 - Step 5: Solve for x
x = 2,723,560,332.28/86,624.63 - Step 6: Final answer
x = 31,440.95
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.