Home / 21,179.85-31,769.42-5,169.54

Finding the Fourth Proportional to 21,179.85, 31,769.42 and 5,169.54

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Solution

The fourth proportional to 21,179.85, 31,769.42 and 5,169.54 is: 7,754.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.85 : 31,769.42 = 5,169.54 : x
  2. Step 2: Convert to fraction form
    21,179.85/31,769.42 = 5,169.54/x
  3. Step 3: Cross multiply
    21,179.85x = 31,769.42 × 5,169.54
  4. Step 4: Simplify right side
    21,179.85x = 164,233,202.05
  5. Step 5: Solve for x
    x = 164,233,202.05/21,179.85
  6. Step 6: Final answer
    x = 7,754.22

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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.