Home / 20,982.72-28,949.61-11,906.58

Finding the Fourth Proportional to 20,982.72, 28,949.61 and 11,906.58

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Solution

The fourth proportional to 20,982.72, 28,949.61 and 11,906.58 is: 16,427.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.72 : 28,949.61 = 11,906.58 : x
  2. Step 2: Convert to fraction form
    20,982.72/28,949.61 = 11,906.58/x
  3. Step 3: Cross multiply
    20,982.72x = 28,949.61 × 11,906.58
  4. Step 4: Simplify right side
    20,982.72x = 344,690,847.43
  5. Step 5: Solve for x
    x = 344,690,847.43/20,982.72
  6. Step 6: Final answer
    x = 16,427.37

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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.