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Finding the Fourth Proportional to 8,958.87, 12,363.10 and 4,979.48

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Solution

The fourth proportional to 8,958.87, 12,363.10 and 4,979.48 is: 6,871.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,958.87 : 12,363.10 = 4,979.48 : x
  2. Step 2: Convert to fraction form
    8,958.87/12,363.10 = 4,979.48/x
  3. Step 3: Cross multiply
    8,958.87x = 12,363.10 × 4,979.48
  4. Step 4: Simplify right side
    8,958.87x = 61,561,734.92
  5. Step 5: Solve for x
    x = 61,561,734.92/8,958.87
  6. Step 6: Final answer
    x = 6,871.60

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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.