Home / 3,934.54-5,429.80-2,142.08

Finding the Fourth Proportional to 3,934.54, 5,429.80 and 2,142.08

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Solution

The fourth proportional to 3,934.54, 5,429.80 and 2,142.08 is: 2,956.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,934.54 : 5,429.80 = 2,142.08 : x
  2. Step 2: Convert to fraction form
    3,934.54/5,429.80 = 2,142.08/x
  3. Step 3: Cross multiply
    3,934.54x = 5,429.80 × 2,142.08
  4. Step 4: Simplify right side
    3,934.54x = 11,631,074.20
  5. Step 5: Solve for x
    x = 11,631,074.20/3,934.54
  6. Step 6: Final answer
    x = 2,956.15

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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.