Home / 3,727.25-5,143.31-2,155.45

Finding the Fourth Proportional to 3,727.25, 5,143.31 and 2,155.45

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Solution

The fourth proportional to 3,727.25, 5,143.31 and 2,155.45 is: 2,974.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,727.25 : 5,143.31 = 2,155.45 : x
  2. Step 2: Convert to fraction form
    3,727.25/5,143.31 = 2,155.45/x
  3. Step 3: Cross multiply
    3,727.25x = 5,143.31 × 2,155.45
  4. Step 4: Simplify right side
    3,727.25x = 11,086,131.99
  5. Step 5: Solve for x
    x = 11,086,131.99/3,727.25
  6. Step 6: Final answer
    x = 2,974.34

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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.