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Finding the Fourth Proportional to 8,648.80, 12,963.12 and 3,969.31

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Solution

The fourth proportional to 8,648.80, 12,963.12 and 3,969.31 is: 5,949.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,648.80 : 12,963.12 = 3,969.31 : x
  2. Step 2: Convert to fraction form
    8,648.80/12,963.12 = 3,969.31/x
  3. Step 3: Cross multiply
    8,648.80x = 12,963.12 × 3,969.31
  4. Step 4: Simplify right side
    8,648.80x = 51,454,628.05
  5. Step 5: Solve for x
    x = 51,454,628.05/8,648.80
  6. Step 6: Final answer
    x = 5,949.33

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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.