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Finding the Fourth Proportional to 11,378.50, 17,067.76 and 3,170.50

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Solution

The fourth proportional to 11,378.50, 17,067.76 and 3,170.50 is: 4,755.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,378.50 : 17,067.76 = 3,170.50 : x
  2. Step 2: Convert to fraction form
    11,378.50/17,067.76 = 3,170.50/x
  3. Step 3: Cross multiply
    11,378.50x = 17,067.76 × 3,170.50
  4. Step 4: Simplify right side
    11,378.50x = 54,113,333.08
  5. Step 5: Solve for x
    x = 54,113,333.08/11,378.50
  6. Step 6: Final answer
    x = 4,755.75

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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.