Home / 10,821.29-16,230.30-3,424.78

Finding the Fourth Proportional to 10,821.29, 16,230.30 and 3,424.78

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Solution

The fourth proportional to 10,821.29, 16,230.30 and 3,424.78 is: 5,136.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,821.29 : 16,230.30 = 3,424.78 : x
  2. Step 2: Convert to fraction form
    10,821.29/16,230.30 = 3,424.78/x
  3. Step 3: Cross multiply
    10,821.29x = 16,230.30 × 3,424.78
  4. Step 4: Simplify right side
    10,821.29x = 55,585,198.27
  5. Step 5: Solve for x
    x = 55,585,198.27/10,821.29
  6. Step 6: Final answer
    x = 5,136.65

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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.