Home / 20,680.13-28,538.72-11,248.76

Finding the Fourth Proportional to 20,680.13, 28,538.72 and 11,248.76

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Solution

The fourth proportional to 20,680.13, 28,538.72 and 11,248.76 is: 15,523.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.13 : 28,538.72 = 11,248.76 : x
  2. Step 2: Convert to fraction form
    20,680.13/28,538.72 = 11,248.76/x
  3. Step 3: Cross multiply
    20,680.13x = 28,538.72 × 11,248.76
  4. Step 4: Simplify right side
    20,680.13x = 321,025,013.05
  5. Step 5: Solve for x
    x = 321,025,013.05/20,680.13
  6. Step 6: Final answer
    x = 15,523.36

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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.