Home / 7,942.56-11,915.04-2,747.20

Finding the Fourth Proportional to 7,942.56, 11,915.04 and 2,747.20

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Solution

The fourth proportional to 7,942.56, 11,915.04 and 2,747.20 is: 4,121.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,942.56 : 11,915.04 = 2,747.20 : x
  2. Step 2: Convert to fraction form
    7,942.56/11,915.04 = 2,747.20/x
  3. Step 3: Cross multiply
    7,942.56x = 11,915.04 × 2,747.20
  4. Step 4: Simplify right side
    7,942.56x = 32,732,997.89
  5. Step 5: Solve for x
    x = 32,732,997.89/7,942.56
  6. Step 6: Final answer
    x = 4,121.22

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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.