Home / 11,815.66-17,718.94-3,915.78

Finding the Fourth Proportional to 11,815.66, 17,718.94 and 3,915.78

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Solution

The fourth proportional to 11,815.66, 17,718.94 and 3,915.78 is: 5,872.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,815.66 : 17,718.94 = 3,915.78 : x
  2. Step 2: Convert to fraction form
    11,815.66/17,718.94 = 3,915.78/x
  3. Step 3: Cross multiply
    11,815.66x = 17,718.94 × 3,915.78
  4. Step 4: Simplify right side
    11,815.66x = 69,383,470.87
  5. Step 5: Solve for x
    x = 69,383,470.87/11,815.66
  6. Step 6: Final answer
    x = 5,872.16

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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.