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Finding the Fourth Proportional to 8,961.54, 12,361.20 and 7,072.52

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Solution

The fourth proportional to 8,961.54, 12,361.20 and 7,072.52 is: 9,755.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,961.54 : 12,361.20 = 7,072.52 : x
  2. Step 2: Convert to fraction form
    8,961.54/12,361.20 = 7,072.52/x
  3. Step 3: Cross multiply
    8,961.54x = 12,361.20 × 7,072.52
  4. Step 4: Simplify right side
    8,961.54x = 87,424,772.42
  5. Step 5: Solve for x
    x = 87,424,772.42/8,961.54
  6. Step 6: Final answer
    x = 9,755.55

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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.