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Finding the Fourth Proportional to 7,204.78, 9,942.60 and 3,892.78

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Solution

The fourth proportional to 7,204.78, 9,942.60 and 3,892.78 is: 5,372.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,204.78 : 9,942.60 = 3,892.78 : x
  2. Step 2: Convert to fraction form
    7,204.78/9,942.60 = 3,892.78/x
  3. Step 3: Cross multiply
    7,204.78x = 9,942.60 × 3,892.78
  4. Step 4: Simplify right side
    7,204.78x = 38,704,381.45
  5. Step 5: Solve for x
    x = 38,704,381.45/7,204.78
  6. Step 6: Final answer
    x = 5,372.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.