Home / 20,691.87-28,528.10-15,034.83

Finding the Fourth Proportional to 20,691.87, 28,528.10 and 15,034.83

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Solution

The fourth proportional to 20,691.87, 28,528.10 and 15,034.83 is: 20,728.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.87 : 28,528.10 = 15,034.83 : x
  2. Step 2: Convert to fraction form
    20,691.87/28,528.10 = 15,034.83/x
  3. Step 3: Cross multiply
    20,691.87x = 28,528.10 × 15,034.83
  4. Step 4: Simplify right side
    20,691.87x = 428,915,058.55
  5. Step 5: Solve for x
    x = 428,915,058.55/20,691.87
  6. Step 6: Final answer
    x = 20,728.68

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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.