Home / 3,938.40-5,435.01-2,169.90

Finding the Fourth Proportional to 3,938.40, 5,435.01 and 2,169.90

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Solution

The fourth proportional to 3,938.40, 5,435.01 and 2,169.90 is: 2,994.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.40 : 5,435.01 = 2,169.90 : x
  2. Step 2: Convert to fraction form
    3,938.40/5,435.01 = 2,169.90/x
  3. Step 3: Cross multiply
    3,938.40x = 5,435.01 × 2,169.90
  4. Step 4: Simplify right side
    3,938.40x = 11,793,428.20
  5. Step 5: Solve for x
    x = 11,793,428.20/3,938.40
  6. Step 6: Final answer
    x = 2,994.47

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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.