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Finding the Fourth Proportional to 8,581.97, 12,870.20 and 4,421.43

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Solution

The fourth proportional to 8,581.97, 12,870.20 and 4,421.43 is: 6,630.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,581.97 : 12,870.20 = 4,421.43 : x
  2. Step 2: Convert to fraction form
    8,581.97/12,870.20 = 4,421.43/x
  3. Step 3: Cross multiply
    8,581.97x = 12,870.20 × 4,421.43
  4. Step 4: Simplify right side
    8,581.97x = 56,904,666.28
  5. Step 5: Solve for x
    x = 56,904,666.28/8,581.97
  6. Step 6: Final answer
    x = 6,630.73

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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.