Home / 20,951.00-31,421.33-12,519.92

Finding the Fourth Proportional to 20,951.00, 31,421.33 and 12,519.92

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Solution

The fourth proportional to 20,951.00, 31,421.33 and 12,519.92 is: 18,776.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.00 : 31,421.33 = 12,519.92 : x
  2. Step 2: Convert to fraction form
    20,951.00/31,421.33 = 12,519.92/x
  3. Step 3: Cross multiply
    20,951.00x = 31,421.33 × 12,519.92
  4. Step 4: Simplify right side
    20,951.00x = 393,392,318.19
  5. Step 5: Solve for x
    x = 393,392,318.19/20,951.00
  6. Step 6: Final answer
    x = 18,776.78

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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.