Home / 9,105.38-12,558.87-6,422.12

Finding the Fourth Proportional to 9,105.38, 12,558.87 and 6,422.12

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Solution

The fourth proportional to 9,105.38, 12,558.87 and 6,422.12 is: 8,857.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,105.38 : 12,558.87 = 6,422.12 : x
  2. Step 2: Convert to fraction form
    9,105.38/12,558.87 = 6,422.12/x
  3. Step 3: Cross multiply
    9,105.38x = 12,558.87 × 6,422.12
  4. Step 4: Simplify right side
    9,105.38x = 80,654,507.41
  5. Step 5: Solve for x
    x = 80,654,507.41/9,105.38
  6. Step 6: Final answer
    x = 8,857.90

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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.