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Finding the Fourth Proportional to 7,915.32, 11,869.02 and 2,648.52

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Solution

The fourth proportional to 7,915.32, 11,869.02 and 2,648.52 is: 3,971.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.32 : 11,869.02 = 2,648.52 : x
  2. Step 2: Convert to fraction form
    7,915.32/11,869.02 = 2,648.52/x
  3. Step 3: Cross multiply
    7,915.32x = 11,869.02 × 2,648.52
  4. Step 4: Simplify right side
    7,915.32x = 31,435,336.85
  5. Step 5: Solve for x
    x = 31,435,336.85/7,915.32
  6. Step 6: Final answer
    x = 3,971.45

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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.