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Finding the Fourth Proportional to 8,572.65, 12,861.40 and 2,729.71

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Solution

The fourth proportional to 8,572.65, 12,861.40 and 2,729.71 is: 4,095.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,572.65 : 12,861.40 = 2,729.71 : x
  2. Step 2: Convert to fraction form
    8,572.65/12,861.40 = 2,729.71/x
  3. Step 3: Cross multiply
    8,572.65x = 12,861.40 × 2,729.71
  4. Step 4: Simplify right side
    8,572.65x = 35,107,892.19
  5. Step 5: Solve for x
    x = 35,107,892.19/8,572.65
  6. Step 6: Final answer
    x = 4,095.34

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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.