Home / 10,821.90-16,231.77-3,030.78

Finding the Fourth Proportional to 10,821.90, 16,231.77 and 3,030.78

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Solution

The fourth proportional to 10,821.90, 16,231.77 and 3,030.78 is: 4,545.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,821.90 : 16,231.77 = 3,030.78 : x
  2. Step 2: Convert to fraction form
    10,821.90/16,231.77 = 3,030.78/x
  3. Step 3: Cross multiply
    10,821.90x = 16,231.77 × 3,030.78
  4. Step 4: Simplify right side
    10,821.90x = 49,194,923.88
  5. Step 5: Solve for x
    x = 49,194,923.88/10,821.90
  6. Step 6: Final answer
    x = 4,545.87

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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.