Home / 6,839.88-9,439.16-3,855.78

Finding the Fourth Proportional to 6,839.88, 9,439.16 and 3,855.78

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Solution

The fourth proportional to 6,839.88, 9,439.16 and 3,855.78 is: 5,321.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,839.88 : 9,439.16 = 3,855.78 : x
  2. Step 2: Convert to fraction form
    6,839.88/9,439.16 = 3,855.78/x
  3. Step 3: Cross multiply
    6,839.88x = 9,439.16 × 3,855.78
  4. Step 4: Simplify right side
    6,839.88x = 36,395,324.34
  5. Step 5: Solve for x
    x = 36,395,324.34/6,839.88
  6. Step 6: Final answer
    x = 5,321.05

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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.