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Finding the Fourth Proportional to 7,958.43, 11,940.03 and 3,212.15

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Solution

The fourth proportional to 7,958.43, 11,940.03 and 3,212.15 is: 4,819.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,958.43 : 11,940.03 = 3,212.15 : x
  2. Step 2: Convert to fraction form
    7,958.43/11,940.03 = 3,212.15/x
  3. Step 3: Cross multiply
    7,958.43x = 11,940.03 × 3,212.15
  4. Step 4: Simplify right side
    7,958.43x = 38,353,115.90
  5. Step 5: Solve for x
    x = 38,353,115.90/7,958.43
  6. Step 6: Final answer
    x = 4,819.18

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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.