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Finding the Fourth Proportional to 11,143.80, 16,715.79 and 9,061.38

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Solution

The fourth proportional to 11,143.80, 16,715.79 and 9,061.38 is: 13,592.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,143.80 : 16,715.79 = 9,061.38 : x
  2. Step 2: Convert to fraction form
    11,143.80/16,715.79 = 9,061.38/x
  3. Step 3: Cross multiply
    11,143.80x = 16,715.79 × 9,061.38
  4. Step 4: Simplify right side
    11,143.80x = 151,468,125.19
  5. Step 5: Solve for x
    x = 151,468,125.19/11,143.80
  6. Step 6: Final answer
    x = 13,592.14

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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.