Home / 3,927.14-5,419.25-2,158.70

Finding the Fourth Proportional to 3,927.14, 5,419.25 and 2,158.70

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Solution

The fourth proportional to 3,927.14, 5,419.25 and 2,158.70 is: 2,978.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.14 : 5,419.25 = 2,158.70 : x
  2. Step 2: Convert to fraction form
    3,927.14/5,419.25 = 2,158.70/x
  3. Step 3: Cross multiply
    3,927.14x = 5,419.25 × 2,158.70
  4. Step 4: Simplify right side
    3,927.14x = 11,698,537.73
  5. Step 5: Solve for x
    x = 11,698,537.73/3,927.14
  6. Step 6: Final answer
    x = 2,978.90

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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.