Home / 31,920.62-47,884.20-12,215.75

Finding the Fourth Proportional to 31,920.62, 47,884.20 and 12,215.75

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Solution

The fourth proportional to 31,920.62, 47,884.20 and 12,215.75 is: 18,324.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,920.62 : 47,884.20 = 12,215.75 : x
  2. Step 2: Convert to fraction form
    31,920.62/47,884.20 = 12,215.75/x
  3. Step 3: Cross multiply
    31,920.62x = 47,884.20 × 12,215.75
  4. Step 4: Simplify right side
    31,920.62x = 584,941,416.15
  5. Step 5: Solve for x
    x = 584,941,416.15/31,920.62
  6. Step 6: Final answer
    x = 18,324.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.