Home / 12,187.10-18,279.30-3,422.90

Finding the Fourth Proportional to 12,187.10, 18,279.30 and 3,422.90

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Solution

The fourth proportional to 12,187.10, 18,279.30 and 3,422.90 is: 5,133.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.10 : 18,279.30 = 3,422.90 : x
  2. Step 2: Convert to fraction form
    12,187.10/18,279.30 = 3,422.90/x
  3. Step 3: Cross multiply
    12,187.10x = 18,279.30 × 3,422.90
  4. Step 4: Simplify right side
    12,187.10x = 62,568,215.97
  5. Step 5: Solve for x
    x = 62,568,215.97/12,187.10
  6. Step 6: Final answer
    x = 5,133.97

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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.