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Finding the Fourth Proportional to 8,963.97, 13,388.61 and 8,118.41

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Solution

The fourth proportional to 8,963.97, 13,388.61 and 8,118.41 is: 12,125.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,963.97 : 13,388.61 = 8,118.41 : x
  2. Step 2: Convert to fraction form
    8,963.97/13,388.61 = 8,118.41/x
  3. Step 3: Cross multiply
    8,963.97x = 13,388.61 × 8,118.41
  4. Step 4: Simplify right side
    8,963.97x = 108,694,218.46
  5. Step 5: Solve for x
    x = 108,694,218.46/8,963.97
  6. Step 6: Final answer
    x = 12,125.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.