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Finding the Fourth Proportional to 20,296, 30,453.12 and 12,898.54

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Solution

The fourth proportional to 20,296, 30,453.12 and 12,898.54 is: 19,353.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,296 : 30,453.12 = 12,898.54 : x
  2. Step 2: Convert to fraction form
    20,296/30,453.12 = 12,898.54/x
  3. Step 3: Cross multiply
    20,296x = 30,453.12 × 12,898.54
  4. Step 4: Simplify right side
    20,296x = 392,800,786.44
  5. Step 5: Solve for x
    x = 392,800,786.44/20,296
  6. Step 6: Final answer
    x = 19,353.61

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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.