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Finding the Fourth Proportional to 15,183.80, 20,954.88 and 8,469.68

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Solution

The fourth proportional to 15,183.80, 20,954.88 and 8,469.68 is: 11,688.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,183.80 : 20,954.88 = 8,469.68 : x
  2. Step 2: Convert to fraction form
    15,183.80/20,954.88 = 8,469.68/x
  3. Step 3: Cross multiply
    15,183.80x = 20,954.88 × 8,469.68
  4. Step 4: Simplify right side
    15,183.80x = 177,481,128.04
  5. Step 5: Solve for x
    x = 177,481,128.04/15,183.80
  6. Step 6: Final answer
    x = 11,688.85

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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.