Finding the Fourth Proportional to 7,680,409.60, 11,520,614.40 and 6,420,697.60
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Solution
The fourth proportional to 7,680,409.60, 11,520,614.40 and 6,420,697.60 is: 9,631,046.40
Step by Step Solution
- Step 1: Write the proportion equation
7,680,409.60 : 11,520,614.40 = 6,420,697.60 : x - Step 2: Convert to fraction form
7,680,409.60/11,520,614.40 = 6,420,697.60/x - Step 3: Cross multiply
7,680,409.60x = 11,520,614.40 × 6,420,697.60 - Step 4: Simplify right side
7,680,409.60x = 73,970,381,228,605.44 - Step 5: Solve for x
x = 73,970,381,228,605.44/7,680,409.60 - Step 6: Final answer
x = 9,631,046.40
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Similar ratio
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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.