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Finding the Fourth Proportional to 28,479.61, 42,725.42 and 10,710.43

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Solution

The fourth proportional to 28,479.61, 42,725.42 and 10,710.43 is: 16,067.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,479.61 : 42,725.42 = 10,710.43 : x
  2. Step 2: Convert to fraction form
    28,479.61/42,725.42 = 10,710.43/x
  3. Step 3: Cross multiply
    28,479.61x = 42,725.42 × 10,710.43
  4. Step 4: Simplify right side
    28,479.61x = 457,607,620.13
  5. Step 5: Solve for x
    x = 457,607,620.13/28,479.61
  6. Step 6: Final answer
    x = 16,067.90

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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.