Home / 20,131.83-27,778.97-11,179.41

Finding the Fourth Proportional to 20,131.83, 27,778.97 and 11,179.41

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Solution

The fourth proportional to 20,131.83, 27,778.97 and 11,179.41 is: 15,425.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.83 : 27,778.97 = 11,179.41 : x
  2. Step 2: Convert to fraction form
    20,131.83/27,778.97 = 11,179.41/x
  3. Step 3: Cross multiply
    20,131.83x = 27,778.97 × 11,179.41
  4. Step 4: Simplify right side
    20,131.83x = 310,552,439.11
  5. Step 5: Solve for x
    x = 310,552,439.11/20,131.83
  6. Step 6: Final answer
    x = 15,425.94

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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.