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Finding the Fourth Proportional to 20,874.87, 28,807.26 and 11,443.44

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Solution

The fourth proportional to 20,874.87, 28,807.26 and 11,443.44 is: 15,791.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.87 : 28,807.26 = 11,443.44 : x
  2. Step 2: Convert to fraction form
    20,874.87/28,807.26 = 11,443.44/x
  3. Step 3: Cross multiply
    20,874.87x = 28,807.26 × 11,443.44
  4. Step 4: Simplify right side
    20,874.87x = 329,654,151.37
  5. Step 5: Solve for x
    x = 329,654,151.37/20,874.87
  6. Step 6: Final answer
    x = 15,791.91

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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.