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Finding the Fourth Proportional to 28,149.78, 38,843.28 and 16,216.98

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Solution

The fourth proportional to 28,149.78, 38,843.28 and 16,216.98 is: 22,377.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,149.78 : 38,843.28 = 16,216.98 : x
  2. Step 2: Convert to fraction form
    28,149.78/38,843.28 = 16,216.98/x
  3. Step 3: Cross multiply
    28,149.78x = 38,843.28 × 16,216.98
  4. Step 4: Simplify right side
    28,149.78x = 629,920,694.89
  5. Step 5: Solve for x
    x = 629,920,694.89/28,149.78
  6. Step 6: Final answer
    x = 22,377.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.