Home / 3,745.20-5,168.34-2,151.78

Finding the Fourth Proportional to 3,745.20, 5,168.34 and 2,151.78

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Solution

The fourth proportional to 3,745.20, 5,168.34 and 2,151.78 is: 2,969.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,745.20 : 5,168.34 = 2,151.78 : x
  2. Step 2: Convert to fraction form
    3,745.20/5,168.34 = 2,151.78/x
  3. Step 3: Cross multiply
    3,745.20x = 5,168.34 × 2,151.78
  4. Step 4: Simplify right side
    3,745.20x = 11,121,130.65
  5. Step 5: Solve for x
    x = 11,121,130.65/3,745.20
  6. Step 6: Final answer
    x = 2,969.44

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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.