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Finding the Fourth Proportional to 20,245.77, 30,371.19 and 10,872.90

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Solution

The fourth proportional to 20,245.77, 30,371.19 and 10,872.90 is: 16,310.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,245.77 : 30,371.19 = 10,872.90 : x
  2. Step 2: Convert to fraction form
    20,245.77/30,371.19 = 10,872.90/x
  3. Step 3: Cross multiply
    20,245.77x = 30,371.19 × 10,872.90
  4. Step 4: Simplify right side
    20,245.77x = 330,222,911.75
  5. Step 5: Solve for x
    x = 330,222,911.75/20,245.77
  6. Step 6: Final answer
    x = 16,310.71

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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.