Home / 20,868.60-31,304.82-6,828.69

Finding the Fourth Proportional to 20,868.60, 31,304.82 and 6,828.69

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Solution

The fourth proportional to 20,868.60, 31,304.82 and 6,828.69 is: 10,243.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.60 : 31,304.82 = 6,828.69 : x
  2. Step 2: Convert to fraction form
    20,868.60/31,304.82 = 6,828.69/x
  3. Step 3: Cross multiply
    20,868.60x = 31,304.82 × 6,828.69
  4. Step 4: Simplify right side
    20,868.60x = 213,770,911.29
  5. Step 5: Solve for x
    x = 213,770,911.29/20,868.60
  6. Step 6: Final answer
    x = 10,243.66

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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.