Home / 20,105.78-30,163.73-11,792.75

Finding the Fourth Proportional to 20,105.78, 30,163.73 and 11,792.75

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Solution

The fourth proportional to 20,105.78, 30,163.73 and 11,792.75 is: 17,692.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.78 : 30,163.73 = 11,792.75 : x
  2. Step 2: Convert to fraction form
    20,105.78/30,163.73 = 11,792.75/x
  3. Step 3: Cross multiply
    20,105.78x = 30,163.73 × 11,792.75
  4. Step 4: Simplify right side
    20,105.78x = 355,713,326.96
  5. Step 5: Solve for x
    x = 355,713,326.96/20,105.78
  6. Step 6: Final answer
    x = 17,692.09

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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.