Home / 20,106.78-30,165.26-11,793.75

Finding the Fourth Proportional to 20,106.78, 30,165.26 and 11,793.75

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Solution

The fourth proportional to 20,106.78, 30,165.26 and 11,793.75 is: 17,693.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,106.78 : 30,165.26 = 11,793.75 : x
  2. Step 2: Convert to fraction form
    20,106.78/30,165.26 = 11,793.75/x
  3. Step 3: Cross multiply
    20,106.78x = 30,165.26 × 11,793.75
  4. Step 4: Simplify right side
    20,106.78x = 355,761,476.16
  5. Step 5: Solve for x
    x = 355,761,476.16/20,106.78
  6. Step 6: Final answer
    x = 17,693.61

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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.