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Finding the Fourth Proportional to 20,450, 30,682.20 and 10,069.04

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Solution

The fourth proportional to 20,450, 30,682.20 and 10,069.04 is: 15,107.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,450 : 30,682.20 = 10,069.04 : x
  2. Step 2: Convert to fraction form
    20,450/30,682.20 = 10,069.04/x
  3. Step 3: Cross multiply
    20,450x = 30,682.20 × 10,069.04
  4. Step 4: Simplify right side
    20,450x = 308,940,299.09
  5. Step 5: Solve for x
    x = 308,940,299.09/20,450
  6. Step 6: Final answer
    x = 15,107.11

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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.