Home / 7,122.72-10,689.30-2,684.56

Finding the Fourth Proportional to 7,122.72, 10,689.30 and 2,684.56

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Solution

The fourth proportional to 7,122.72, 10,689.30 and 2,684.56 is: 4,028.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.72 : 10,689.30 = 2,684.56 : x
  2. Step 2: Convert to fraction form
    7,122.72/10,689.30 = 2,684.56/x
  3. Step 3: Cross multiply
    7,122.72x = 10,689.30 × 2,684.56
  4. Step 4: Simplify right side
    7,122.72x = 28,696,067.21
  5. Step 5: Solve for x
    x = 28,696,067.21/7,122.72
  6. Step 6: Final answer
    x = 4,028.81

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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.