Finding the Fourth Proportional to 8,318,979.60, 12,478,469.40 and 2,639,648.40
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Solution
The fourth proportional to 8,318,979.60, 12,478,469.40 and 2,639,648.40 is: 3,959,472.60
Step by Step Solution
- Step 1: Write the proportion equation
8,318,979.60 : 12,478,469.40 = 2,639,648.40 : x - Step 2: Convert to fraction form
8,318,979.60/12,478,469.40 = 2,639,648.40/x - Step 3: Cross multiply
8,318,979.60x = 12,478,469.40 × 2,639,648.40 - Step 4: Simplify right side
8,318,979.60x = 32,938,771,786,158.96 - Step 5: Solve for x
x = 32,938,771,786,158.96/8,318,979.60 - Step 6: Final answer
x = 3,959,472.60
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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.