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Finding the Fourth Proportional to 19,960.59, 29,929.14 and 8,861.97

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Solution

The fourth proportional to 19,960.59, 29,929.14 and 8,861.97 is: 13,287.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,960.59 : 29,929.14 = 8,861.97 : x
  2. Step 2: Convert to fraction form
    19,960.59/29,929.14 = 8,861.97/x
  3. Step 3: Cross multiply
    19,960.59x = 29,929.14 × 8,861.97
  4. Step 4: Simplify right side
    19,960.59x = 265,231,140.81
  5. Step 5: Solve for x
    x = 265,231,140.81/19,960.59
  6. Step 6: Final answer
    x = 13,287.74

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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.