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Finding the Fourth Proportional to 20,757.52, 28,645.14 and 11,325.88

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Solution

The fourth proportional to 20,757.52, 28,645.14 and 11,325.88 is: 15,629.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,757.52 : 28,645.14 = 11,325.88 : x
  2. Step 2: Convert to fraction form
    20,757.52/28,645.14 = 11,325.88/x
  3. Step 3: Cross multiply
    20,757.52x = 28,645.14 × 11,325.88
  4. Step 4: Simplify right side
    20,757.52x = 324,431,418.22
  5. Step 5: Solve for x
    x = 324,431,418.22/20,757.52
  6. Step 6: Final answer
    x = 15,629.58

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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.