Home / 20,930.13-31,405.97-11,568.41

Finding the Fourth Proportional to 20,930.13, 31,405.97 and 11,568.41

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Solution

The fourth proportional to 20,930.13, 31,405.97 and 11,568.41 is: 17,358.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.13 : 31,405.97 = 11,568.41 : x
  2. Step 2: Convert to fraction form
    20,930.13/31,405.97 = 11,568.41/x
  3. Step 3: Cross multiply
    20,930.13x = 31,405.97 × 11,568.41
  4. Step 4: Simplify right side
    20,930.13x = 363,317,137.41
  5. Step 5: Solve for x
    x = 363,317,137.41/20,930.13
  6. Step 6: Final answer
    x = 17,358.57

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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.