Home / 20,867.97-31,301.96-5,286.81

Finding the Fourth Proportional to 20,867.97, 31,301.96 and 5,286.81

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Solution

The fourth proportional to 20,867.97, 31,301.96 and 5,286.81 is: 7,930.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.97 : 31,301.96 = 5,286.81 : x
  2. Step 2: Convert to fraction form
    20,867.97/31,301.96 = 5,286.81/x
  3. Step 3: Cross multiply
    20,867.97x = 31,301.96 × 5,286.81
  4. Step 4: Simplify right side
    20,867.97x = 165,487,488.71
  5. Step 5: Solve for x
    x = 165,487,488.71/20,867.97
  6. Step 6: Final answer
    x = 7,930.22

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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.