Home / 20,647.18-28,493.78-11,694.49

Finding the Fourth Proportional to 20,647.18, 28,493.78 and 11,694.49

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Solution

The fourth proportional to 20,647.18, 28,493.78 and 11,694.49 is: 16,138.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.18 : 28,493.78 = 11,694.49 : x
  2. Step 2: Convert to fraction form
    20,647.18/28,493.78 = 11,694.49/x
  3. Step 3: Cross multiply
    20,647.18x = 28,493.78 × 11,694.49
  4. Step 4: Simplify right side
    20,647.18x = 333,220,183.27
  5. Step 5: Solve for x
    x = 333,220,183.27/20,647.18
  6. Step 6: Final answer
    x = 16,138.78

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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.