Home / 20,691.76-28,555.14-11,260.84

Finding the Fourth Proportional to 20,691.76, 28,555.14 and 11,260.84

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Solution

The fourth proportional to 20,691.76, 28,555.14 and 11,260.84 is: 15,540.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.76 : 28,555.14 = 11,260.84 : x
  2. Step 2: Convert to fraction form
    20,691.76/28,555.14 = 11,260.84/x
  3. Step 3: Cross multiply
    20,691.76x = 28,555.14 × 11,260.84
  4. Step 4: Simplify right side
    20,691.76x = 321,554,862.72
  5. Step 5: Solve for x
    x = 321,554,862.72/20,691.76
  6. Step 6: Final answer
    x = 15,540.24

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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.