Home / 20,716.28-31,049.76-11,933

Finding the Fourth Proportional to 20,716.28, 31,049.76 and 11,933

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Solution

The fourth proportional to 20,716.28, 31,049.76 and 11,933 is: 17,885.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.28 : 31,049.76 = 11,933 : x
  2. Step 2: Convert to fraction form
    20,716.28/31,049.76 = 11,933/x
  3. Step 3: Cross multiply
    20,716.28x = 31,049.76 × 11,933
  4. Step 4: Simplify right side
    20,716.28x = 370,516,786.08
  5. Step 5: Solve for x
    x = 370,516,786.08/20,716.28
  6. Step 6: Final answer
    x = 17,885.30

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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.