Home / 21,207.28-31,819.92-11,344

Finding the Fourth Proportional to 21,207.28, 31,819.92 and 11,344

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Solution

The fourth proportional to 21,207.28, 31,819.92 and 11,344 is: 17,020.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.28 : 31,819.92 = 11,344 : x
  2. Step 2: Convert to fraction form
    21,207.28/31,819.92 = 11,344/x
  3. Step 3: Cross multiply
    21,207.28x = 31,819.92 × 11,344
  4. Step 4: Simplify right side
    21,207.28x = 360,965,172.48
  5. Step 5: Solve for x
    x = 360,965,172.48/21,207.28
  6. Step 6: Final answer
    x = 17,020.81

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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.