Home / 10,517.31-15,776.10-3,121.59

Finding the Fourth Proportional to 10,517.31, 15,776.10 and 3,121.59

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Solution

The fourth proportional to 10,517.31, 15,776.10 and 3,121.59 is: 4,682.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,517.31 : 15,776.10 = 3,121.59 : x
  2. Step 2: Convert to fraction form
    10,517.31/15,776.10 = 3,121.59/x
  3. Step 3: Cross multiply
    10,517.31x = 15,776.10 × 3,121.59
  4. Step 4: Simplify right side
    10,517.31x = 49,246,516.00
  5. Step 5: Solve for x
    x = 49,246,516.00/10,517.31
  6. Step 6: Final answer
    x = 4,682.43

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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.