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Finding the Fourth Proportional to 6,774.82, 9,348.74 and 3,942.21

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Solution

The fourth proportional to 6,774.82, 9,348.74 and 3,942.21 is: 5,439.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,774.82 : 9,348.74 = 3,942.21 : x
  2. Step 2: Convert to fraction form
    6,774.82/9,348.74 = 3,942.21/x
  3. Step 3: Cross multiply
    6,774.82x = 9,348.74 × 3,942.21
  4. Step 4: Simplify right side
    6,774.82x = 36,854,676.60
  5. Step 5: Solve for x
    x = 36,854,676.60/6,774.82
  6. Step 6: Final answer
    x = 5,439.95

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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.