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Finding the Fourth Proportional to 6,121.56, 9,186 and 2,658.84

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Solution

The fourth proportional to 6,121.56, 9,186 and 2,658.84 is: 3,989.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,121.56 : 9,186 = 2,658.84 : x
  2. Step 2: Convert to fraction form
    6,121.56/9,186 = 2,658.84/x
  3. Step 3: Cross multiply
    6,121.56x = 9,186 × 2,658.84
  4. Step 4: Simplify right side
    6,121.56x = 24,424,104.24
  5. Step 5: Solve for x
    x = 24,424,104.24/6,121.56
  6. Step 6: Final answer
    x = 3,989.85

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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.