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Finding the Fourth Proportional to 22,375.81, 30,878.11 and 12,166.62

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Solution

The fourth proportional to 22,375.81, 30,878.11 and 12,166.62 is: 16,789.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,375.81 : 30,878.11 = 12,166.62 : x
  2. Step 2: Convert to fraction form
    22,375.81/30,878.11 = 12,166.62/x
  3. Step 3: Cross multiply
    22,375.81x = 30,878.11 × 12,166.62
  4. Step 4: Simplify right side
    22,375.81x = 375,682,183.91
  5. Step 5: Solve for x
    x = 375,682,183.91/22,375.81
  6. Step 6: Final answer
    x = 16,789.66

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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.