Home / 18,115.18-27,178.45-8,128.44

Finding the Fourth Proportional to 18,115.18, 27,178.45 and 8,128.44

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Solution

The fourth proportional to 18,115.18, 27,178.45 and 8,128.44 is: 12,195.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.18 : 27,178.45 = 8,128.44 : x
  2. Step 2: Convert to fraction form
    18,115.18/27,178.45 = 8,128.44/x
  3. Step 3: Cross multiply
    18,115.18x = 27,178.45 × 8,128.44
  4. Step 4: Simplify right side
    18,115.18x = 220,918,379.80
  5. Step 5: Solve for x
    x = 220,918,379.80/18,115.18
  6. Step 6: Final answer
    x = 12,195.21

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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.