Home / 12,443.28-18,661.05-4,121.43

Finding the Fourth Proportional to 12,443.28, 18,661.05 and 4,121.43

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Solution

The fourth proportional to 12,443.28, 18,661.05 and 4,121.43 is: 6,180.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,443.28 : 18,661.05 = 4,121.43 : x
  2. Step 2: Convert to fraction form
    12,443.28/18,661.05 = 4,121.43/x
  3. Step 3: Cross multiply
    12,443.28x = 18,661.05 × 4,121.43
  4. Step 4: Simplify right side
    12,443.28x = 76,910,211.30
  5. Step 5: Solve for x
    x = 76,910,211.30/12,443.28
  6. Step 6: Final answer
    x = 6,180.86

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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.