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Finding the Fourth Proportional to 18,981.68, 28,472.52 and 16,051.28

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Solution

The fourth proportional to 18,981.68, 28,472.52 and 16,051.28 is: 24,076.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,981.68 : 28,472.52 = 16,051.28 : x
  2. Step 2: Convert to fraction form
    18,981.68/28,472.52 = 16,051.28/x
  3. Step 3: Cross multiply
    18,981.68x = 28,472.52 × 16,051.28
  4. Step 4: Simplify right side
    18,981.68x = 457,020,390.83
  5. Step 5: Solve for x
    x = 457,020,390.83/18,981.68
  6. Step 6: Final answer
    x = 24,076.92

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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.