Home / 20,110.78-30,171.26-11,797.75

Finding the Fourth Proportional to 20,110.78, 30,171.26 and 11,797.75

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Solution

The fourth proportional to 20,110.78, 30,171.26 and 11,797.75 is: 17,699.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,110.78 : 30,171.26 = 11,797.75 : x
  2. Step 2: Convert to fraction form
    20,110.78/30,171.26 = 11,797.75/x
  3. Step 3: Cross multiply
    20,110.78x = 30,171.26 × 11,797.75
  4. Step 4: Simplify right side
    20,110.78x = 355,952,982.67
  5. Step 5: Solve for x
    x = 355,952,982.67/20,110.78
  6. Step 6: Final answer
    x = 17,699.61

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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.