Home / 20,691.78-28,554.39-11,260.14

Finding the Fourth Proportional to 20,691.78, 28,554.39 and 11,260.14

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Solution

The fourth proportional to 20,691.78, 28,554.39 and 11,260.14 is: 15,538.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.78 : 28,554.39 = 11,260.14 : x
  2. Step 2: Convert to fraction form
    20,691.78/28,554.39 = 11,260.14/x
  3. Step 3: Cross multiply
    20,691.78x = 28,554.39 × 11,260.14
  4. Step 4: Simplify right side
    20,691.78x = 321,526,429.01
  5. Step 5: Solve for x
    x = 321,526,429.01/20,691.78
  6. Step 6: Final answer
    x = 15,538.85

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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.