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Finding the Fourth Proportional to 11,789.87, 17,684.55 and 3,469.68

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Solution

The fourth proportional to 11,789.87, 17,684.55 and 3,469.68 is: 5,204.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,789.87 : 17,684.55 = 3,469.68 : x
  2. Step 2: Convert to fraction form
    11,789.87/17,684.55 = 3,469.68/x
  3. Step 3: Cross multiply
    11,789.87x = 17,684.55 × 3,469.68
  4. Step 4: Simplify right side
    11,789.87x = 61,359,729.44
  5. Step 5: Solve for x
    x = 61,359,729.44/11,789.87
  6. Step 6: Final answer
    x = 5,204.45

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1.5x scale

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.