Home / 20,691.76-28,554.24-11,260.12

Finding the Fourth Proportional to 20,691.76, 28,554.24 and 11,260.12

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Solution

The fourth proportional to 20,691.76, 28,554.24 and 11,260.12 is: 15,538.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.76 : 28,554.24 = 11,260.12 : x
  2. Step 2: Convert to fraction form
    20,691.76/28,554.24 = 11,260.12/x
  3. Step 3: Cross multiply
    20,691.76x = 28,554.24 × 11,260.12
  4. Step 4: Simplify right side
    20,691.76x = 321,524,168.91
  5. Step 5: Solve for x
    x = 321,524,168.91/20,691.76
  6. Step 6: Final answer
    x = 15,538.75

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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.