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Finding the Fourth Proportional to 8,321.11, 12,476.12 and 3,389.42

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Solution

The fourth proportional to 8,321.11, 12,476.12 and 3,389.42 is: 5,081.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.11 : 12,476.12 = 3,389.42 : x
  2. Step 2: Convert to fraction form
    8,321.11/12,476.12 = 3,389.42/x
  3. Step 3: Cross multiply
    8,321.11x = 12,476.12 × 3,389.42
  4. Step 4: Simplify right side
    8,321.11x = 42,286,810.65
  5. Step 5: Solve for x
    x = 42,286,810.65/8,321.11
  6. Step 6: Final answer
    x = 5,081.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.