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Finding the Fourth Proportional to 8,363.20, 12,530.40 and 3,971.20

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Solution

The fourth proportional to 8,363.20, 12,530.40 and 3,971.20 is: 5,949.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,363.20 : 12,530.40 = 3,971.20 : x
  2. Step 2: Convert to fraction form
    8,363.20/12,530.40 = 3,971.20/x
  3. Step 3: Cross multiply
    8,363.20x = 12,530.40 × 3,971.20
  4. Step 4: Simplify right side
    8,363.20x = 49,760,724.48
  5. Step 5: Solve for x
    x = 49,760,724.48/8,363.20
  6. Step 6: Final answer
    x = 5,949.96

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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.