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Finding the Fourth Proportional to 14,773.92, 20,387.88 and 8,486.40

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Solution

The fourth proportional to 14,773.92, 20,387.88 and 8,486.40 is: 11,711.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,773.92 : 20,387.88 = 8,486.40 : x
  2. Step 2: Convert to fraction form
    14,773.92/20,387.88 = 8,486.40/x
  3. Step 3: Cross multiply
    14,773.92x = 20,387.88 × 8,486.40
  4. Step 4: Simplify right side
    14,773.92x = 173,019,704.83
  5. Step 5: Solve for x
    x = 173,019,704.83/14,773.92
  6. Step 6: Final answer
    x = 11,711.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.