Home / 3,934.75-5,429.89-2,166.32

Finding the Fourth Proportional to 3,934.75, 5,429.89 and 2,166.32

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Solution

The fourth proportional to 3,934.75, 5,429.89 and 2,166.32 is: 2,989.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.75 : 5,429.89 = 2,166.32 : x
  2. Step 2: Convert to fraction form
    3,934.75/5,429.89 = 2,166.32/x
  3. Step 3: Cross multiply
    3,934.75x = 5,429.89 × 2,166.32
  4. Step 4: Simplify right side
    3,934.75x = 11,762,879.30
  5. Step 5: Solve for x
    x = 11,762,879.30/3,934.75
  6. Step 6: Final answer
    x = 2,989.49

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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.