Home / 8,143.78-12,217.32-2,949.28

Finding the Fourth Proportional to 8,143.78, 12,217.32 and 2,949.28

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Solution

The fourth proportional to 8,143.78, 12,217.32 and 2,949.28 is: 4,424.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,143.78 : 12,217.32 = 2,949.28 : x
  2. Step 2: Convert to fraction form
    8,143.78/12,217.32 = 2,949.28/x
  3. Step 3: Cross multiply
    8,143.78x = 12,217.32 × 2,949.28
  4. Step 4: Simplify right side
    8,143.78x = 36,032,297.53
  5. Step 5: Solve for x
    x = 36,032,297.53/8,143.78
  6. Step 6: Final answer
    x = 4,424.52

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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.