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Finding the Fourth Proportional to 18,937.88, 28,410.92 and 7,251.09

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Solution

The fourth proportional to 18,937.88, 28,410.92 and 7,251.09 is: 10,878.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.88 : 28,410.92 = 7,251.09 : x
  2. Step 2: Convert to fraction form
    18,937.88/28,410.92 = 7,251.09/x
  3. Step 3: Cross multiply
    18,937.88x = 28,410.92 × 7,251.09
  4. Step 4: Simplify right side
    18,937.88x = 206,010,137.90
  5. Step 5: Solve for x
    x = 206,010,137.90/18,937.88
  6. Step 6: Final answer
    x = 10,878.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.