Home / 6,840.40-9,439.82-3,855.97

Finding the Fourth Proportional to 6,840.40, 9,439.82 and 3,855.97

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Solution

The fourth proportional to 6,840.40, 9,439.82 and 3,855.97 is: 5,321.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,840.40 : 9,439.82 = 3,855.97 : x
  2. Step 2: Convert to fraction form
    6,840.40/9,439.82 = 3,855.97/x
  3. Step 3: Cross multiply
    6,840.40x = 9,439.82 × 3,855.97
  4. Step 4: Simplify right side
    6,840.40x = 36,399,662.73
  5. Step 5: Solve for x
    x = 36,399,662.73/6,840.40
  6. Step 6: Final answer
    x = 5,321.28

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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.