Home / 18,286.71-27,431.55-5,139.20

Finding the Fourth Proportional to 18,286.71, 27,431.55 and 5,139.20

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Solution

The fourth proportional to 18,286.71, 27,431.55 and 5,139.20 is: 7,709.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,286.71 : 27,431.55 = 5,139.20 : x
  2. Step 2: Convert to fraction form
    18,286.71/27,431.55 = 5,139.20/x
  3. Step 3: Cross multiply
    18,286.71x = 27,431.55 × 5,139.20
  4. Step 4: Simplify right side
    18,286.71x = 140,976,084.60
  5. Step 5: Solve for x
    x = 140,976,084.60/18,286.71
  6. Step 6: Final answer
    x = 7,709.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.