Home / 18,129.18-27,198.91-8,131.64

Finding the Fourth Proportional to 18,129.18, 27,198.91 and 8,131.64

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Solution

The fourth proportional to 18,129.18, 27,198.91 and 8,131.64 is: 12,199.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,129.18 : 27,198.91 = 8,131.64 : x
  2. Step 2: Convert to fraction form
    18,129.18/27,198.91 = 8,131.64/x
  3. Step 3: Cross multiply
    18,129.18x = 27,198.91 × 8,131.64
  4. Step 4: Simplify right side
    18,129.18x = 221,171,725.94
  5. Step 5: Solve for x
    x = 221,171,725.94/18,129.18
  6. Step 6: Final answer
    x = 12,199.76

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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.