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Finding the Fourth Proportional to 6,381.11, 8,808.09 and 3,960.32

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Solution

The fourth proportional to 6,381.11, 8,808.09 and 3,960.32 is: 5,466.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,381.11 : 8,808.09 = 3,960.32 : x
  2. Step 2: Convert to fraction form
    6,381.11/8,808.09 = 3,960.32/x
  3. Step 3: Cross multiply
    6,381.11x = 8,808.09 × 3,960.32
  4. Step 4: Simplify right side
    6,381.11x = 34,882,810.95
  5. Step 5: Solve for x
    x = 34,882,810.95/6,381.11
  6. Step 6: Final answer
    x = 5,466.58

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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.