Home / 20,773.35-31,110.35-11,981.61

Finding the Fourth Proportional to 20,773.35, 31,110.35 and 11,981.61

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Solution

The fourth proportional to 20,773.35, 31,110.35 and 11,981.61 is: 17,943.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,773.35 : 31,110.35 = 11,981.61 : x
  2. Step 2: Convert to fraction form
    20,773.35/31,110.35 = 11,981.61/x
  3. Step 3: Cross multiply
    20,773.35x = 31,110.35 × 11,981.61
  4. Step 4: Simplify right side
    20,773.35x = 372,752,020.76
  5. Step 5: Solve for x
    x = 372,752,020.76/20,773.35
  6. Step 6: Final answer
    x = 17,943.76

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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.