Home / 12,578.26-18,865.23-3,811.90

Finding the Fourth Proportional to 12,578.26, 18,865.23 and 3,811.90

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Solution

The fourth proportional to 12,578.26, 18,865.23 and 3,811.90 is: 5,717.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578.26 : 18,865.23 = 3,811.90 : x
  2. Step 2: Convert to fraction form
    12,578.26/18,865.23 = 3,811.90/x
  3. Step 3: Cross multiply
    12,578.26x = 18,865.23 × 3,811.90
  4. Step 4: Simplify right side
    12,578.26x = 71,912,370.24
  5. Step 5: Solve for x
    x = 71,912,370.24/12,578.26
  6. Step 6: Final answer
    x = 5,717.20

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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.