Home / 3,938.40-5,434.92-2,169.96

Finding the Fourth Proportional to 3,938.40, 5,434.92 and 2,169.96

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Solution

The fourth proportional to 3,938.40, 5,434.92 and 2,169.96 is: 2,994.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.40 : 5,434.92 = 2,169.96 : x
  2. Step 2: Convert to fraction form
    3,938.40/5,434.92 = 2,169.96/x
  3. Step 3: Cross multiply
    3,938.40x = 5,434.92 × 2,169.96
  4. Step 4: Simplify right side
    3,938.40x = 11,793,559.00
  5. Step 5: Solve for x
    x = 11,793,559.00/3,938.40
  6. Step 6: Final answer
    x = 2,994.51

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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.