Home / 20,126.78-30,195.26-11,813.75

Finding the Fourth Proportional to 20,126.78, 30,195.26 and 11,813.75

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Solution

The fourth proportional to 20,126.78, 30,195.26 and 11,813.75 is: 17,723.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,126.78 : 30,195.26 = 11,813.75 : x
  2. Step 2: Convert to fraction form
    20,126.78/30,195.26 = 11,813.75/x
  3. Step 3: Cross multiply
    20,126.78x = 30,195.26 × 11,813.75
  4. Step 4: Simplify right side
    20,126.78x = 356,719,252.83
  5. Step 5: Solve for x
    x = 356,719,252.83/20,126.78
  6. Step 6: Final answer
    x = 17,723.61

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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.