Home / 20,961.23-31,435.16-6,918.65

Finding the Fourth Proportional to 20,961.23, 31,435.16 and 6,918.65

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Solution

The fourth proportional to 20,961.23, 31,435.16 and 6,918.65 is: 10,375.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.23 : 31,435.16 = 6,918.65 : x
  2. Step 2: Convert to fraction form
    20,961.23/31,435.16 = 6,918.65/x
  3. Step 3: Cross multiply
    20,961.23x = 31,435.16 × 6,918.65
  4. Step 4: Simplify right side
    20,961.23x = 217,488,677.96
  5. Step 5: Solve for x
    x = 217,488,677.96/20,961.23
  6. Step 6: Final answer
    x = 10,375.76

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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.