Home / 12,138.28-18,198.44-3,813.56

Finding the Fourth Proportional to 12,138.28, 18,198.44 and 3,813.56

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Solution

The fourth proportional to 12,138.28, 18,198.44 and 3,813.56 is: 5,717.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.28 : 18,198.44 = 3,813.56 : x
  2. Step 2: Convert to fraction form
    12,138.28/18,198.44 = 3,813.56/x
  3. Step 3: Cross multiply
    12,138.28x = 18,198.44 × 3,813.56
  4. Step 4: Simplify right side
    12,138.28x = 69,400,842.85
  5. Step 5: Solve for x
    x = 69,400,842.85/12,138.28
  6. Step 6: Final answer
    x = 5,717.52

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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.