Home / 2,745.72-3,790.82-2,115.06

Finding the Fourth Proportional to 2,745.72, 3,790.82 and 2,115.06

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Solution

The fourth proportional to 2,745.72, 3,790.82 and 2,115.06 is: 2,920.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,745.72 : 3,790.82 = 2,115.06 : x
  2. Step 2: Convert to fraction form
    2,745.72/3,790.82 = 2,115.06/x
  3. Step 3: Cross multiply
    2,745.72x = 3,790.82 × 2,115.06
  4. Step 4: Simplify right side
    2,745.72x = 8,017,801.17
  5. Step 5: Solve for x
    x = 8,017,801.17/2,745.72
  6. Step 6: Final answer
    x = 2,920.11

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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.