Home / 3,938.49-5,435.12-2,170.14

Finding the Fourth Proportional to 3,938.49, 5,435.12 and 2,170.14

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Solution

The fourth proportional to 3,938.49, 5,435.12 and 2,170.14 is: 2,994.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.49 : 5,435.12 = 2,170.14 : x
  2. Step 2: Convert to fraction form
    3,938.49/5,435.12 = 2,170.14/x
  3. Step 3: Cross multiply
    3,938.49x = 5,435.12 × 2,170.14
  4. Step 4: Simplify right side
    3,938.49x = 11,794,944.14
  5. Step 5: Solve for x
    x = 11,794,944.14/3,938.49
  6. Step 6: Final answer
    x = 2,994.79

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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.