Home / 10,516.91-15,775.42-3,121.43

Finding the Fourth Proportional to 10,516.91, 15,775.42 and 3,121.43

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Solution

The fourth proportional to 10,516.91, 15,775.42 and 3,121.43 is: 4,682.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,516.91 : 15,775.42 = 3,121.43 : x
  2. Step 2: Convert to fraction form
    10,516.91/15,775.42 = 3,121.43/x
  3. Step 3: Cross multiply
    10,516.91x = 15,775.42 × 3,121.43
  4. Step 4: Simplify right side
    10,516.91x = 49,241,869.25
  5. Step 5: Solve for x
    x = 49,241,869.25/10,516.91
  6. Step 6: Final answer
    x = 4,682.16

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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.