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Finding the Fourth Proportional to 8,874.20, 12,238.62 and 7,105.16

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Solution

The fourth proportional to 8,874.20, 12,238.62 and 7,105.16 is: 9,798.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,874.20 : 12,238.62 = 7,105.16 : x
  2. Step 2: Convert to fraction form
    8,874.20/12,238.62 = 7,105.16/x
  3. Step 3: Cross multiply
    8,874.20x = 12,238.62 × 7,105.16
  4. Step 4: Simplify right side
    8,874.20x = 86,957,353.28
  5. Step 5: Solve for x
    x = 86,957,353.28/8,874.20
  6. Step 6: Final answer
    x = 9,798.89

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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.