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Finding the Fourth Proportional to 11,745.67, 17,619.65 and 3,425.75

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Solution

The fourth proportional to 11,745.67, 17,619.65 and 3,425.75 is: 5,138.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,745.67 : 17,619.65 = 3,425.75 : x
  2. Step 2: Convert to fraction form
    11,745.67/17,619.65 = 3,425.75/x
  3. Step 3: Cross multiply
    11,745.67x = 17,619.65 × 3,425.75
  4. Step 4: Simplify right side
    11,745.67x = 60,360,515.99
  5. Step 5: Solve for x
    x = 60,360,515.99/11,745.67
  6. Step 6: Final answer
    x = 5,138.96

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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.