Home / 20,811.52-31,179.48-12,027.88

Finding the Fourth Proportional to 20,811.52, 31,179.48 and 12,027.88

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Solution

The fourth proportional to 20,811.52, 31,179.48 and 12,027.88 is: 18,019.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.52 : 31,179.48 = 12,027.88 : x
  2. Step 2: Convert to fraction form
    20,811.52/31,179.48 = 12,027.88/x
  3. Step 3: Cross multiply
    20,811.52x = 31,179.48 × 12,027.88
  4. Step 4: Simplify right side
    20,811.52x = 375,023,043.90
  5. Step 5: Solve for x
    x = 375,023,043.90/20,811.52
  6. Step 6: Final answer
    x = 18,019.97

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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.