Home / 8,639.28-12,935.84-4,936.41

Finding the Fourth Proportional to 8,639.28, 12,935.84 and 4,936.41

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Solution

The fourth proportional to 8,639.28, 12,935.84 and 4,936.41 is: 7,391.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.28 : 12,935.84 = 4,936.41 : x
  2. Step 2: Convert to fraction form
    8,639.28/12,935.84 = 4,936.41/x
  3. Step 3: Cross multiply
    8,639.28x = 12,935.84 × 4,936.41
  4. Step 4: Simplify right side
    8,639.28x = 63,856,585.25
  5. Step 5: Solve for x
    x = 63,856,585.25/8,639.28
  6. Step 6: Final answer
    x = 7,391.42

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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.