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Finding the Fourth Proportional to 7,940.92, 11,911.88 and 2,097.38

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Solution

The fourth proportional to 7,940.92, 11,911.88 and 2,097.38 is: 3,146.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,940.92 : 11,911.88 = 2,097.38 : x
  2. Step 2: Convert to fraction form
    7,940.92/11,911.88 = 2,097.38/x
  3. Step 3: Cross multiply
    7,940.92x = 11,911.88 × 2,097.38
  4. Step 4: Simplify right side
    7,940.92x = 24,983,684.56
  5. Step 5: Solve for x
    x = 24,983,684.56/7,940.92
  6. Step 6: Final answer
    x = 3,146.20

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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.