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Finding the Fourth Proportional to 6,397.98, 8,829.23 and 3,879.44

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Solution

The fourth proportional to 6,397.98, 8,829.23 and 3,879.44 is: 5,353.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,397.98 : 8,829.23 = 3,879.44 : x
  2. Step 2: Convert to fraction form
    6,397.98/8,829.23 = 3,879.44/x
  3. Step 3: Cross multiply
    6,397.98x = 8,829.23 × 3,879.44
  4. Step 4: Simplify right side
    6,397.98x = 34,252,404.49
  5. Step 5: Solve for x
    x = 34,252,404.49/6,397.98
  6. Step 6: Final answer
    x = 5,353.63

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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.