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Finding the Fourth Proportional to 5,425.33, 8,138.97 and 1,917.38

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Solution

The fourth proportional to 5,425.33, 8,138.97 and 1,917.38 is: 2,876.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,425.33 : 8,138.97 = 1,917.38 : x
  2. Step 2: Convert to fraction form
    5,425.33/8,138.97 = 1,917.38/x
  3. Step 3: Cross multiply
    5,425.33x = 8,138.97 × 1,917.38
  4. Step 4: Simplify right side
    5,425.33x = 15,605,527.40
  5. Step 5: Solve for x
    x = 15,605,527.40/5,425.33
  6. Step 6: Final answer
    x = 2,876.42

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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.