Home / 3,938.53-5,435.12-2,170.10

Finding the Fourth Proportional to 3,938.53, 5,435.12 and 2,170.10

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Solution

The fourth proportional to 3,938.53, 5,435.12 and 2,170.10 is: 2,994.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.53 : 5,435.12 = 2,170.10 : x
  2. Step 2: Convert to fraction form
    3,938.53/5,435.12 = 2,170.10/x
  3. Step 3: Cross multiply
    3,938.53x = 5,435.12 × 2,170.10
  4. Step 4: Simplify right side
    3,938.53x = 11,794,753.91
  5. Step 5: Solve for x
    x = 11,794,753.91/3,938.53
  6. Step 6: Final answer
    x = 2,994.71

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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.