Home / 20,131-27,780.78-11,747.56

Finding the Fourth Proportional to 20,131, 27,780.78 and 11,747.56

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Solution

The fourth proportional to 20,131, 27,780.78 and 11,747.56 is: 16,211.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131 : 27,780.78 = 11,747.56 : x
  2. Step 2: Convert to fraction form
    20,131/27,780.78 = 11,747.56/x
  3. Step 3: Cross multiply
    20,131x = 27,780.78 × 11,747.56
  4. Step 4: Simplify right side
    20,131x = 326,356,379.90
  5. Step 5: Solve for x
    x = 326,356,379.90/20,131
  6. Step 6: Final answer
    x = 16,211.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.