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Finding the Fourth Proportional to 28,951.61, 39,949.85 and 16,205.50

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Solution

The fourth proportional to 28,951.61, 39,949.85 and 16,205.50 is: 22,361.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,951.61 : 39,949.85 = 16,205.50 : x
  2. Step 2: Convert to fraction form
    28,951.61/39,949.85 = 16,205.50/x
  3. Step 3: Cross multiply
    28,951.61x = 39,949.85 × 16,205.50
  4. Step 4: Simplify right side
    28,951.61x = 647,407,234.81
  5. Step 5: Solve for x
    x = 647,407,234.81/28,951.61
  6. Step 6: Final answer
    x = 22,361.70

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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.