Home / 3,938.79-5,435.19-2,169.96

Finding the Fourth Proportional to 3,938.79, 5,435.19 and 2,169.96

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Solution

The fourth proportional to 3,938.79, 5,435.19 and 2,169.96 is: 2,994.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.79 : 5,435.19 = 2,169.96 : x
  2. Step 2: Convert to fraction form
    3,938.79/5,435.19 = 2,169.96/x
  3. Step 3: Cross multiply
    3,938.79x = 5,435.19 × 2,169.96
  4. Step 4: Simplify right side
    3,938.79x = 11,794,144.89
  5. Step 5: Solve for x
    x = 11,794,144.89/3,938.79
  6. Step 6: Final answer
    x = 2,994.36

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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.