Home / 3,938.62-5,435.31-2,170.21

Finding the Fourth Proportional to 3,938.62, 5,435.31 and 2,170.21

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Solution

The fourth proportional to 3,938.62, 5,435.31 and 2,170.21 is: 2,994.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.62 : 5,435.31 = 2,170.21 : x
  2. Step 2: Convert to fraction form
    3,938.62/5,435.31 = 2,170.21/x
  3. Step 3: Cross multiply
    3,938.62x = 5,435.31 × 2,170.21
  4. Step 4: Simplify right side
    3,938.62x = 11,795,764.12
  5. Step 5: Solve for x
    x = 11,795,764.12/3,938.62
  6. Step 6: Final answer
    x = 2,994.90

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.