Home / 20,131.02-27,778.73-11,177.55

Finding the Fourth Proportional to 20,131.02, 27,778.73 and 11,177.55

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Solution

The fourth proportional to 20,131.02, 27,778.73 and 11,177.55 is: 15,423.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.02 : 27,778.73 = 11,177.55 : x
  2. Step 2: Convert to fraction form
    20,131.02/27,778.73 = 11,177.55/x
  3. Step 3: Cross multiply
    20,131.02x = 27,778.73 × 11,177.55
  4. Step 4: Simplify right side
    20,131.02x = 310,498,087.62
  5. Step 5: Solve for x
    x = 310,498,087.62/20,131.02
  6. Step 6: Final answer
    x = 15,423.86

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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.