Home / 20,131.18-27,780.10-11,179.25

Finding the Fourth Proportional to 20,131.18, 27,780.10 and 11,179.25

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Solution

The fourth proportional to 20,131.18, 27,780.10 and 11,179.25 is: 15,426.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.18 : 27,780.10 = 11,179.25 : x
  2. Step 2: Convert to fraction form
    20,131.18/27,780.10 = 11,179.25/x
  3. Step 3: Cross multiply
    20,131.18x = 27,780.10 × 11,179.25
  4. Step 4: Simplify right side
    20,131.18x = 310,560,620.25
  5. Step 5: Solve for x
    x = 310,560,620.25/20,131.18
  6. Step 6: Final answer
    x = 15,426.85

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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.