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Finding the Fourth Proportional to 7,939.76, 11,915.10 and 3,562.11

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Solution

The fourth proportional to 7,939.76, 11,915.10 and 3,562.11 is: 5,345.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,939.76 : 11,915.10 = 3,562.11 : x
  2. Step 2: Convert to fraction form
    7,939.76/11,915.10 = 3,562.11/x
  3. Step 3: Cross multiply
    7,939.76x = 11,915.10 × 3,562.11
  4. Step 4: Simplify right side
    7,939.76x = 42,442,896.86
  5. Step 5: Solve for x
    x = 42,442,896.86/7,939.76
  6. Step 6: Final answer
    x = 5,345.62

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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.