Home / 3,938.18-5,434.49-2,169.75

Finding the Fourth Proportional to 3,938.18, 5,434.49 and 2,169.75

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Solution

The fourth proportional to 3,938.18, 5,434.49 and 2,169.75 is: 2,994.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.18 : 5,434.49 = 2,169.75 : x
  2. Step 2: Convert to fraction form
    3,938.18/5,434.49 = 2,169.75/x
  3. Step 3: Cross multiply
    3,938.18x = 5,434.49 × 2,169.75
  4. Step 4: Simplify right side
    3,938.18x = 11,791,446.66
  5. Step 5: Solve for x
    x = 11,791,446.66/3,938.18
  6. Step 6: Final answer
    x = 2,994.14

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1.5x scale

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.