Home / 20,121.50-27,766.38-11,169.02

Finding the Fourth Proportional to 20,121.50, 27,766.38 and 11,169.02

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Solution

The fourth proportional to 20,121.50, 27,766.38 and 11,169.02 is: 15,412.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.50 : 27,766.38 = 11,169.02 : x
  2. Step 2: Convert to fraction form
    20,121.50/27,766.38 = 11,169.02/x
  3. Step 3: Cross multiply
    20,121.50x = 27,766.38 × 11,169.02
  4. Step 4: Simplify right side
    20,121.50x = 310,123,253.55
  5. Step 5: Solve for x
    x = 310,123,253.55/20,121.50
  6. Step 6: Final answer
    x = 15,412.53

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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.