Home / 20,747.50-31,121.26-6,896.50

Finding the Fourth Proportional to 20,747.50, 31,121.26 and 6,896.50

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Solution

The fourth proportional to 20,747.50, 31,121.26 and 6,896.50 is: 10,344.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.50 : 31,121.26 = 6,896.50 : x
  2. Step 2: Convert to fraction form
    20,747.50/31,121.26 = 6,896.50/x
  3. Step 3: Cross multiply
    20,747.50x = 31,121.26 × 6,896.50
  4. Step 4: Simplify right side
    20,747.50x = 214,627,769.59
  5. Step 5: Solve for x
    x = 214,627,769.59/20,747.50
  6. Step 6: Final answer
    x = 10,344.75

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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.