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Finding the Fourth Proportional to 18,918.12, 28,350.60 and 14,951.94

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Solution

The fourth proportional to 18,918.12, 28,350.60 and 14,951.94 is: 22,406.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.12 : 28,350.60 = 14,951.94 : x
  2. Step 2: Convert to fraction form
    18,918.12/28,350.60 = 14,951.94/x
  3. Step 3: Cross multiply
    18,918.12x = 28,350.60 × 14,951.94
  4. Step 4: Simplify right side
    18,918.12x = 423,896,470.16
  5. Step 5: Solve for x
    x = 423,896,470.16/18,918.12
  6. Step 6: Final answer
    x = 22,406.90

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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.