Home / 20,857.82-31,286.75-5,275.44

Finding the Fourth Proportional to 20,857.82, 31,286.75 and 5,275.44

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Solution

The fourth proportional to 20,857.82, 31,286.75 and 5,275.44 is: 7,913.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.82 : 31,286.75 = 5,275.44 : x
  2. Step 2: Convert to fraction form
    20,857.82/31,286.75 = 5,275.44/x
  3. Step 3: Cross multiply
    20,857.82x = 31,286.75 × 5,275.44
  4. Step 4: Simplify right side
    20,857.82x = 165,051,346.04
  5. Step 5: Solve for x
    x = 165,051,346.04/20,857.82
  6. Step 6: Final answer
    x = 7,913.17

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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.