Home / 20,121.74-27,769.25-11,169.39

Finding the Fourth Proportional to 20,121.74, 27,769.25 and 11,169.39

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Solution

The fourth proportional to 20,121.74, 27,769.25 and 11,169.39 is: 15,414.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.74 : 27,769.25 = 11,169.39 : x
  2. Step 2: Convert to fraction form
    20,121.74/27,769.25 = 11,169.39/x
  3. Step 3: Cross multiply
    20,121.74x = 27,769.25 × 11,169.39
  4. Step 4: Simplify right side
    20,121.74x = 310,165,559.11
  5. Step 5: Solve for x
    x = 310,165,559.11/20,121.74
  6. Step 6: Final answer
    x = 15,414.45

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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.