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Finding the Fourth Proportional to 8,865.62, 12,231.12 and 5,087.42

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Solution

The fourth proportional to 8,865.62, 12,231.12 and 5,087.42 is: 7,018.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,865.62 : 12,231.12 = 5,087.42 : x
  2. Step 2: Convert to fraction form
    8,865.62/12,231.12 = 5,087.42/x
  3. Step 3: Cross multiply
    8,865.62x = 12,231.12 × 5,087.42
  4. Step 4: Simplify right side
    8,865.62x = 62,224,757.92
  5. Step 5: Solve for x
    x = 62,224,757.92/8,865.62
  6. Step 6: Final answer
    x = 7,018.66

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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.