Finding the Fourth Proportional to 7,890,331.20, 11,835,496.80 and 6,471,988.80
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Solution
The fourth proportional to 7,890,331.20, 11,835,496.80 and 6,471,988.80 is: 9,707,983.20
Step by Step Solution
- Step 1: Write the proportion equation
7,890,331.20 : 11,835,496.80 = 6,471,988.80 : x - Step 2: Convert to fraction form
7,890,331.20/11,835,496.80 = 6,471,988.80/x - Step 3: Cross multiply
7,890,331.20x = 11,835,496.80 × 6,471,988.80 - Step 4: Simplify right side
7,890,331.20x = 76,599,202,732,035.84 - Step 5: Solve for x
x = 76,599,202,732,035.84/7,890,331.20 - Step 6: Final answer
x = 9,707,983.20
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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.