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Finding the Fourth Proportional to 12,168.80, 16,792.80 and 6,863.60

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Solution

The fourth proportional to 12,168.80, 16,792.80 and 6,863.60 is: 9,471.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,168.80 : 16,792.80 = 6,863.60 : x
  2. Step 2: Convert to fraction form
    12,168.80/16,792.80 = 6,863.60/x
  3. Step 3: Cross multiply
    12,168.80x = 16,792.80 × 6,863.60
  4. Step 4: Simplify right side
    12,168.80x = 115,259,062.08
  5. Step 5: Solve for x
    x = 115,259,062.08/12,168.80
  6. Step 6: Final answer
    x = 9,471.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.