Home / 3,934.80-5,429.94-2,166.38

Finding the Fourth Proportional to 3,934.80, 5,429.94 and 2,166.38

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Solution

The fourth proportional to 3,934.80, 5,429.94 and 2,166.38 is: 2,989.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.80 : 5,429.94 = 2,166.38 : x
  2. Step 2: Convert to fraction form
    3,934.80/5,429.94 = 2,166.38/x
  3. Step 3: Cross multiply
    3,934.80x = 5,429.94 × 2,166.38
  4. Step 4: Simplify right side
    3,934.80x = 11,763,313.42
  5. Step 5: Solve for x
    x = 11,763,313.42/3,934.80
  6. Step 6: Final answer
    x = 2,989.56

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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.