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Finding the Fourth Proportional to 8,915.40, 13,375.22 and 3,071.84

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Solution

The fourth proportional to 8,915.40, 13,375.22 and 3,071.84 is: 4,608.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.40 : 13,375.22 = 3,071.84 : x
  2. Step 2: Convert to fraction form
    8,915.40/13,375.22 = 3,071.84/x
  3. Step 3: Cross multiply
    8,915.40x = 13,375.22 × 3,071.84
  4. Step 4: Simplify right side
    8,915.40x = 41,086,453.57
  5. Step 5: Solve for x
    x = 41,086,453.57/8,915.40
  6. Step 6: Final answer
    x = 4,608.48

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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.