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Finding the Fourth Proportional to 8,611.38, 12,915.36 and 2,369.79

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Solution

The fourth proportional to 8,611.38, 12,915.36 and 2,369.79 is: 3,554.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.38 : 12,915.36 = 2,369.79 : x
  2. Step 2: Convert to fraction form
    8,611.38/12,915.36 = 2,369.79/x
  3. Step 3: Cross multiply
    8,611.38x = 12,915.36 × 2,369.79
  4. Step 4: Simplify right side
    8,611.38x = 30,606,690.97
  5. Step 5: Solve for x
    x = 30,606,690.97/8,611.38
  6. Step 6: Final answer
    x = 3,554.21

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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.