Home / 20,769.92-31,143.36-6,911.36

Finding the Fourth Proportional to 20,769.92, 31,143.36 and 6,911.36

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Solution

The fourth proportional to 20,769.92, 31,143.36 and 6,911.36 is: 10,363.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.92 : 31,143.36 = 6,911.36 : x
  2. Step 2: Convert to fraction form
    20,769.92/31,143.36 = 6,911.36/x
  3. Step 3: Cross multiply
    20,769.92x = 31,143.36 × 6,911.36
  4. Step 4: Simplify right side
    20,769.92x = 215,242,972.57
  5. Step 5: Solve for x
    x = 215,242,972.57/20,769.92
  6. Step 6: Final answer
    x = 10,363.21

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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.