Home / 10,517.24-15,776.12-3,121.80

Finding the Fourth Proportional to 10,517.24, 15,776.12 and 3,121.80

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Solution

The fourth proportional to 10,517.24, 15,776.12 and 3,121.80 is: 4,682.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,517.24 : 15,776.12 = 3,121.80 : x
  2. Step 2: Convert to fraction form
    10,517.24/15,776.12 = 3,121.80/x
  3. Step 3: Cross multiply
    10,517.24x = 15,776.12 × 3,121.80
  4. Step 4: Simplify right side
    10,517.24x = 49,249,891.42
  5. Step 5: Solve for x
    x = 49,249,891.42/10,517.24
  6. Step 6: Final answer
    x = 4,682.78

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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.