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Finding the Fourth Proportional to 18,838.46, 28,243.10 and 8,982.38

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Solution

The fourth proportional to 18,838.46, 28,243.10 and 8,982.38 is: 13,466.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,838.46 : 28,243.10 = 8,982.38 : x
  2. Step 2: Convert to fraction form
    18,838.46/28,243.10 = 8,982.38/x
  3. Step 3: Cross multiply
    18,838.46x = 28,243.10 × 8,982.38
  4. Step 4: Simplify right side
    18,838.46x = 253,690,070.45
  5. Step 5: Solve for x
    x = 253,690,070.45/18,838.46
  6. Step 6: Final answer
    x = 13,466.61

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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.