Home / 3,935.60-5,431.28-2,167.17

Finding the Fourth Proportional to 3,935.60, 5,431.28 and 2,167.17

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Solution

The fourth proportional to 3,935.60, 5,431.28 and 2,167.17 is: 2,990.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.60 : 5,431.28 = 2,167.17 : x
  2. Step 2: Convert to fraction form
    3,935.60/5,431.28 = 2,167.17/x
  3. Step 3: Cross multiply
    3,935.60x = 5,431.28 × 2,167.17
  4. Step 4: Simplify right side
    3,935.60x = 11,770,507.08
  5. Step 5: Solve for x
    x = 11,770,507.08/3,935.60
  6. Step 6: Final answer
    x = 2,990.78

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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.