Finding the Fourth Proportional to 8,190,640.10, 12,285,960.15 and 8,031,207.80
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Solution
The fourth proportional to 8,190,640.10, 12,285,960.15 and 8,031,207.80 is: 12,046,811.70
Step by Step Solution
- Step 1: Write the proportion equation
8,190,640.10 : 12,285,960.15 = 8,031,207.80 : x - Step 2: Convert to fraction form
8,190,640.10/12,285,960.15 = 8,031,207.80/x - Step 3: Cross multiply
8,190,640.10x = 12,285,960.15 × 8,031,207.80 - Step 4: Simplify right side
8,190,640.10x = 98,671,098,987,169.17 - Step 5: Solve for x
x = 98,671,098,987,169.17/8,190,640.10 - Step 6: Final answer
x = 12,046,811.70
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Double scale
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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.