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Finding the Fourth Proportional to 18,666.16, 27,972.90 and 10,349.88

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Solution

The fourth proportional to 18,666.16, 27,972.90 and 10,349.88 is: 15,510.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.16 : 27,972.90 = 10,349.88 : x
  2. Step 2: Convert to fraction form
    18,666.16/27,972.90 = 10,349.88/x
  3. Step 3: Cross multiply
    18,666.16x = 27,972.90 × 10,349.88
  4. Step 4: Simplify right side
    18,666.16x = 289,516,158.25
  5. Step 5: Solve for x
    x = 289,516,158.25/18,666.16
  6. Step 6: Final answer
    x = 15,510.22

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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.