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Finding the Fourth Proportional to 22,379.64, 30,883.21 and 12,306.69

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Solution

The fourth proportional to 22,379.64, 30,883.21 and 12,306.69 is: 16,982.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,379.64 : 30,883.21 = 12,306.69 : x
  2. Step 2: Convert to fraction form
    22,379.64/30,883.21 = 12,306.69/x
  3. Step 3: Cross multiply
    22,379.64x = 30,883.21 × 12,306.69
  4. Step 4: Simplify right side
    22,379.64x = 380,070,091.67
  5. Step 5: Solve for x
    x = 380,070,091.67/22,379.64
  6. Step 6: Final answer
    x = 16,982.85

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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.