Home / 31,620.36-43,616.76-20,286

Finding the Fourth Proportional to 31,620.36, 43,616.76 and 20,286

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Solution

The fourth proportional to 31,620.36, 43,616.76 and 20,286 is: 27,982.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,620.36 : 43,616.76 = 20,286 : x
  2. Step 2: Convert to fraction form
    31,620.36/43,616.76 = 20,286/x
  3. Step 3: Cross multiply
    31,620.36x = 43,616.76 × 20,286
  4. Step 4: Simplify right side
    31,620.36x = 884,809,593.36
  5. Step 5: Solve for x
    x = 884,809,593.36/31,620.36
  6. Step 6: Final answer
    x = 27,982.27

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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.