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Finding the Fourth Proportional to 22,980.69, 34,463.70 and 8,939.79

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Solution

The fourth proportional to 22,980.69, 34,463.70 and 8,939.79 is: 13,406.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,980.69 : 34,463.70 = 8,939.79 : x
  2. Step 2: Convert to fraction form
    22,980.69/34,463.70 = 8,939.79/x
  3. Step 3: Cross multiply
    22,980.69x = 34,463.70 × 8,939.79
  4. Step 4: Simplify right side
    22,980.69x = 308,098,240.62
  5. Step 5: Solve for x
    x = 308,098,240.62/22,980.69
  6. Step 6: Final answer
    x = 13,406.83

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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.