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Finding the Fourth Proportional to 22,451.20, 30,984.06 and 12,379.64

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Solution

The fourth proportional to 22,451.20, 30,984.06 and 12,379.64 is: 17,084.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,451.20 : 30,984.06 = 12,379.64 : x
  2. Step 2: Convert to fraction form
    22,451.20/30,984.06 = 12,379.64/x
  3. Step 3: Cross multiply
    22,451.20x = 30,984.06 × 12,379.64
  4. Step 4: Simplify right side
    22,451.20x = 383,571,508.54
  5. Step 5: Solve for x
    x = 383,571,508.54/22,451.20
  6. Step 6: Final answer
    x = 17,084.68

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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.