Home / 12,143.41-18,215.11-3,378.55

Finding the Fourth Proportional to 12,143.41, 18,215.11 and 3,378.55

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Solution

The fourth proportional to 12,143.41, 18,215.11 and 3,378.55 is: 5,067.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.41 : 18,215.11 = 3,378.55 : x
  2. Step 2: Convert to fraction form
    12,143.41/18,215.11 = 3,378.55/x
  3. Step 3: Cross multiply
    12,143.41x = 18,215.11 × 3,378.55
  4. Step 4: Simplify right side
    12,143.41x = 61,540,659.89
  5. Step 5: Solve for x
    x = 61,540,659.89/12,143.41
  6. Step 6: Final answer
    x = 5,067.82

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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.