Home / 12,109.07-18,163.62-3,789.80

Finding the Fourth Proportional to 12,109.07, 18,163.62 and 3,789.80

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Solution

The fourth proportional to 12,109.07, 18,163.62 and 3,789.80 is: 5,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,109.07 : 18,163.62 = 3,789.80 : x
  2. Step 2: Convert to fraction form
    12,109.07/18,163.62 = 3,789.80/x
  3. Step 3: Cross multiply
    12,109.07x = 18,163.62 × 3,789.80
  4. Step 4: Simplify right side
    12,109.07x = 68,836,377.31
  5. Step 5: Solve for x
    x = 68,836,377.31/12,109.07
  6. Step 6: Final answer
    x = 5,684.70

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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.