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Finding the Fourth Proportional to 8,874.56, 12,249.76 and 5,728.32

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Solution

The fourth proportional to 8,874.56, 12,249.76 and 5,728.32 is: 7,906.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,874.56 : 12,249.76 = 5,728.32 : x
  2. Step 2: Convert to fraction form
    8,874.56/12,249.76 = 5,728.32/x
  3. Step 3: Cross multiply
    8,874.56x = 12,249.76 × 5,728.32
  4. Step 4: Simplify right side
    8,874.56x = 70,170,545.20
  5. Step 5: Solve for x
    x = 70,170,545.20/8,874.56
  6. Step 6: Final answer
    x = 7,906.93

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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.