Home / 5,429.76-8,137.92-1,963.20

Finding the Fourth Proportional to 5,429.76, 8,137.92 and 1,963.20

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Solution

The fourth proportional to 5,429.76, 8,137.92 and 1,963.20 is: 2,942.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,429.76 : 8,137.92 = 1,963.20 : x
  2. Step 2: Convert to fraction form
    5,429.76/8,137.92 = 1,963.20/x
  3. Step 3: Cross multiply
    5,429.76x = 8,137.92 × 1,963.20
  4. Step 4: Simplify right side
    5,429.76x = 15,976,364.54
  5. Step 5: Solve for x
    x = 15,976,364.54/5,429.76
  6. Step 6: Final answer
    x = 2,942.37

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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.