Home / 21,234.27-31,865.28-8,086.77

Finding the Fourth Proportional to 21,234.27, 31,865.28 and 8,086.77

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Solution

The fourth proportional to 21,234.27, 31,865.28 and 8,086.77 is: 12,135.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,234.27 : 31,865.28 = 8,086.77 : x
  2. Step 2: Convert to fraction form
    21,234.27/31,865.28 = 8,086.77/x
  3. Step 3: Cross multiply
    21,234.27x = 31,865.28 × 8,086.77
  4. Step 4: Simplify right side
    21,234.27x = 257,687,190.35
  5. Step 5: Solve for x
    x = 257,687,190.35/21,234.27
  6. Step 6: Final answer
    x = 12,135.44

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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.