Home / 3,938.67-5,435.30-2,170.25

Finding the Fourth Proportional to 3,938.67, 5,435.30 and 2,170.25

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Solution

The fourth proportional to 3,938.67, 5,435.30 and 2,170.25 is: 2,994.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.67 : 5,435.30 = 2,170.25 : x
  2. Step 2: Convert to fraction form
    3,938.67/5,435.30 = 2,170.25/x
  3. Step 3: Cross multiply
    3,938.67x = 5,435.30 × 2,170.25
  4. Step 4: Simplify right side
    3,938.67x = 11,795,921.80
  5. Step 5: Solve for x
    x = 11,795,921.80/3,938.67
  6. Step 6: Final answer
    x = 2,994.90

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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.