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Finding the Fourth Proportional to 28,229.62, 38,945.76 and 16,290.65

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Solution

The fourth proportional to 28,229.62, 38,945.76 and 16,290.65 is: 22,474.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,229.62 : 38,945.76 = 16,290.65 : x
  2. Step 2: Convert to fraction form
    28,229.62/38,945.76 = 16,290.65/x
  3. Step 3: Cross multiply
    28,229.62x = 38,945.76 × 16,290.65
  4. Step 4: Simplify right side
    28,229.62x = 634,451,745.14
  5. Step 5: Solve for x
    x = 634,451,745.14/28,229.62
  6. Step 6: Final answer
    x = 22,474.68

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Double scale
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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.