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Finding the Fourth Proportional to 8,604.20, 12,914.40 and 5,323.70

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Solution

The fourth proportional to 8,604.20, 12,914.40 and 5,323.70 is: 7,990.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,604.20 : 12,914.40 = 5,323.70 : x
  2. Step 2: Convert to fraction form
    8,604.20/12,914.40 = 5,323.70/x
  3. Step 3: Cross multiply
    8,604.20x = 12,914.40 × 5,323.70
  4. Step 4: Simplify right side
    8,604.20x = 68,752,391.28
  5. Step 5: Solve for x
    x = 68,752,391.28/8,604.20
  6. Step 6: Final answer
    x = 7,990.56

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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.