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Finding the Fourth Proportional to 18,937.91, 28,410.96 and 7,251.13

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Solution

The fourth proportional to 18,937.91, 28,410.96 and 7,251.13 is: 10,878.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.91 : 28,410.96 = 7,251.13 : x
  2. Step 2: Convert to fraction form
    18,937.91/28,410.96 = 7,251.13/x
  3. Step 3: Cross multiply
    18,937.91x = 28,410.96 × 7,251.13
  4. Step 4: Simplify right side
    18,937.91x = 206,011,422.33
  5. Step 5: Solve for x
    x = 206,011,422.33/18,937.91
  6. Step 6: Final answer
    x = 10,878.26

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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.