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Finding the Fourth Proportional to 7,915.55, 11,874.94 and 2,651.09

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Solution

The fourth proportional to 7,915.55, 11,874.94 and 2,651.09 is: 3,977.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.55 : 11,874.94 = 2,651.09 : x
  2. Step 2: Convert to fraction form
    7,915.55/11,874.94 = 2,651.09/x
  3. Step 3: Cross multiply
    7,915.55x = 11,874.94 × 2,651.09
  4. Step 4: Simplify right side
    7,915.55x = 31,481,468.68
  5. Step 5: Solve for x
    x = 31,481,468.68/7,915.55
  6. Step 6: Final answer
    x = 3,977.17

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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.