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Finding the Fourth Proportional to 7,274.76, 10,915.90 and 3,381.96

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Solution

The fourth proportional to 7,274.76, 10,915.90 and 3,381.96 is: 5,074.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,274.76 : 10,915.90 = 3,381.96 : x
  2. Step 2: Convert to fraction form
    7,274.76/10,915.90 = 3,381.96/x
  3. Step 3: Cross multiply
    7,274.76x = 10,915.90 × 3,381.96
  4. Step 4: Simplify right side
    7,274.76x = 36,917,137.16
  5. Step 5: Solve for x
    x = 36,917,137.16/7,274.76
  6. Step 6: Final answer
    x = 5,074.69

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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.