Home / 3,975.78-5,961.90-2,126.54

Finding the Fourth Proportional to 3,975.78, 5,961.90 and 2,126.54

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Solution

The fourth proportional to 3,975.78, 5,961.90 and 2,126.54 is: 3,188.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,975.78 : 5,961.90 = 2,126.54 : x
  2. Step 2: Convert to fraction form
    3,975.78/5,961.90 = 2,126.54/x
  3. Step 3: Cross multiply
    3,975.78x = 5,961.90 × 2,126.54
  4. Step 4: Simplify right side
    3,975.78x = 12,678,218.83
  5. Step 5: Solve for x
    x = 12,678,218.83/3,975.78
  6. Step 6: Final answer
    x = 3,188.86

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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.