Home / 21,007.14-31,519.97-11,144

Finding the Fourth Proportional to 21,007.14, 31,519.97 and 11,144

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Solution

The fourth proportional to 21,007.14, 31,519.97 and 11,144 is: 16,720.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.14 : 31,519.97 = 11,144 : x
  2. Step 2: Convert to fraction form
    21,007.14/31,519.97 = 11,144/x
  3. Step 3: Cross multiply
    21,007.14x = 31,519.97 × 11,144
  4. Step 4: Simplify right side
    21,007.14x = 351,258,545.68
  5. Step 5: Solve for x
    x = 351,258,545.68/21,007.14
  6. Step 6: Final answer
    x = 16,720.91

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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.