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Finding the Fourth Proportional to 8,565.70, 12,849.90 and 2,722.90

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Solution

The fourth proportional to 8,565.70, 12,849.90 and 2,722.90 is: 4,084.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,565.70 : 12,849.90 = 2,722.90 : x
  2. Step 2: Convert to fraction form
    8,565.70/12,849.90 = 2,722.90/x
  3. Step 3: Cross multiply
    8,565.70x = 12,849.90 × 2,722.90
  4. Step 4: Simplify right side
    8,565.70x = 34,988,992.71
  5. Step 5: Solve for x
    x = 34,988,992.71/8,565.70
  6. Step 6: Final answer
    x = 4,084.78

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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.