Home / 12,786.43-17,651.14-8,255.75

Finding the Fourth Proportional to 12,786.43, 17,651.14 and 8,255.75

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Solution

The fourth proportional to 12,786.43, 17,651.14 and 8,255.75 is: 11,396.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,786.43 : 17,651.14 = 8,255.75 : x
  2. Step 2: Convert to fraction form
    12,786.43/17,651.14 = 8,255.75/x
  3. Step 3: Cross multiply
    12,786.43x = 17,651.14 × 8,255.75
  4. Step 4: Simplify right side
    12,786.43x = 145,723,474.72
  5. Step 5: Solve for x
    x = 145,723,474.72/12,786.43
  6. Step 6: Final answer
    x = 11,396.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.