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Finding the Fourth Proportional to 28,638, 39,520.46 and 16,062.75

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Solution

The fourth proportional to 28,638, 39,520.46 and 16,062.75 is: 22,166.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,638 : 39,520.46 = 16,062.75 : x
  2. Step 2: Convert to fraction form
    28,638/39,520.46 = 16,062.75/x
  3. Step 3: Cross multiply
    28,638x = 39,520.46 × 16,062.75
  4. Step 4: Simplify right side
    28,638x = 634,807,309.02
  5. Step 5: Solve for x
    x = 634,807,309.02/28,638
  6. Step 6: Final answer
    x = 22,166.61

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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.