Home / 2,745.78-3,789.12-1,961.16

Finding the Fourth Proportional to 2,745.78, 3,789.12 and 1,961.16

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Solution

The fourth proportional to 2,745.78, 3,789.12 and 1,961.16 is: 2,706.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,745.78 : 3,789.12 = 1,961.16 : x
  2. Step 2: Convert to fraction form
    2,745.78/3,789.12 = 1,961.16/x
  3. Step 3: Cross multiply
    2,745.78x = 3,789.12 × 1,961.16
  4. Step 4: Simplify right side
    2,745.78x = 7,431,070.58
  5. Step 5: Solve for x
    x = 7,431,070.58/2,745.78
  6. Step 6: Final answer
    x = 2,706.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.