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Finding the Fourth Proportional to 7,915.71, 11,874.24 and 2,072.31

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Solution

The fourth proportional to 7,915.71, 11,874.24 and 2,072.31 is: 3,108.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.71 : 11,874.24 = 2,072.31 : x
  2. Step 2: Convert to fraction form
    7,915.71/11,874.24 = 2,072.31/x
  3. Step 3: Cross multiply
    7,915.71x = 11,874.24 × 2,072.31
  4. Step 4: Simplify right side
    7,915.71x = 24,607,106.29
  5. Step 5: Solve for x
    x = 24,607,106.29/7,915.71
  6. Step 6: Final answer
    x = 3,108.64

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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.