Home / 10,517.28-15,775.80-3,121.80

Finding the Fourth Proportional to 10,517.28, 15,775.80 and 3,121.80

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Solution

The fourth proportional to 10,517.28, 15,775.80 and 3,121.80 is: 4,682.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,517.28 : 15,775.80 = 3,121.80 : x
  2. Step 2: Convert to fraction form
    10,517.28/15,775.80 = 3,121.80/x
  3. Step 3: Cross multiply
    10,517.28x = 15,775.80 × 3,121.80
  4. Step 4: Simplify right side
    10,517.28x = 49,248,892.44
  5. Step 5: Solve for x
    x = 49,248,892.44/10,517.28
  6. Step 6: Final answer
    x = 4,682.66

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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.