Home / 3,938.94-5,435.73-2,170.55

Finding the Fourth Proportional to 3,938.94, 5,435.73 and 2,170.55

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Solution

The fourth proportional to 3,938.94, 5,435.73 and 2,170.55 is: 2,995.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.94 : 5,435.73 = 2,170.55 : x
  2. Step 2: Convert to fraction form
    3,938.94/5,435.73 = 2,170.55/x
  3. Step 3: Cross multiply
    3,938.94x = 5,435.73 × 2,170.55
  4. Step 4: Simplify right side
    3,938.94x = 11,798,515.59
  5. Step 5: Solve for x
    x = 11,798,515.59/3,938.94
  6. Step 6: Final answer
    x = 2,995.35

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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.