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Finding the Fourth Proportional to 8,641.28, 12,968.84 and 3,963.49

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Solution

The fourth proportional to 8,641.28, 12,968.84 and 3,963.49 is: 5,948.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641.28 : 12,968.84 = 3,963.49 : x
  2. Step 2: Convert to fraction form
    8,641.28/12,968.84 = 3,963.49/x
  3. Step 3: Cross multiply
    8,641.28x = 12,968.84 × 3,963.49
  4. Step 4: Simplify right side
    8,641.28x = 51,401,910.66
  5. Step 5: Solve for x
    x = 51,401,910.66/8,641.28
  6. Step 6: Final answer
    x = 5,948.41

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1.5x scale

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.