Home / 20,305.35-28,021.72-11,351.88

Finding the Fourth Proportional to 20,305.35, 28,021.72 and 11,351.88

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Solution

The fourth proportional to 20,305.35, 28,021.72 and 11,351.88 is: 15,665.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,305.35 : 28,021.72 = 11,351.88 : x
  2. Step 2: Convert to fraction form
    20,305.35/28,021.72 = 11,351.88/x
  3. Step 3: Cross multiply
    20,305.35x = 28,021.72 × 11,351.88
  4. Step 4: Simplify right side
    20,305.35x = 318,099,062.73
  5. Step 5: Solve for x
    x = 318,099,062.73/20,305.35
  6. Step 6: Final answer
    x = 15,665.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.