Home / 20,377.68-28,121.92-11,425.30

Finding the Fourth Proportional to 20,377.68, 28,121.92 and 11,425.30

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Solution

The fourth proportional to 20,377.68, 28,121.92 and 11,425.30 is: 15,767.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.68 : 28,121.92 = 11,425.30 : x
  2. Step 2: Convert to fraction form
    20,377.68/28,121.92 = 11,425.30/x
  3. Step 3: Cross multiply
    20,377.68x = 28,121.92 × 11,425.30
  4. Step 4: Simplify right side
    20,377.68x = 321,301,372.58
  5. Step 5: Solve for x
    x = 321,301,372.58/20,377.68
  6. Step 6: Final answer
    x = 15,767.32

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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.