Home / 12,143.90-18,213.75-3,378.86

Finding the Fourth Proportional to 12,143.90, 18,213.75 and 3,378.86

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Solution

The fourth proportional to 12,143.90, 18,213.75 and 3,378.86 is: 5,067.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.90 : 18,213.75 = 3,378.86 : x
  2. Step 2: Convert to fraction form
    12,143.90/18,213.75 = 3,378.86/x
  3. Step 3: Cross multiply
    12,143.90x = 18,213.75 × 3,378.86
  4. Step 4: Simplify right side
    12,143.90x = 61,541,711.33
  5. Step 5: Solve for x
    x = 61,541,711.33/12,143.90
  6. Step 6: Final answer
    x = 5,067.71

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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.