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Finding the Fourth Proportional to 12,609.22, 18,916.88 and 3,843.60

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Solution

The fourth proportional to 12,609.22, 18,916.88 and 3,843.60 is: 5,766.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,609.22 : 18,916.88 = 3,843.60 : x
  2. Step 2: Convert to fraction form
    12,609.22/18,916.88 = 3,843.60/x
  3. Step 3: Cross multiply
    12,609.22x = 18,916.88 × 3,843.60
  4. Step 4: Simplify right side
    12,609.22x = 72,708,919.97
  5. Step 5: Solve for x
    x = 72,708,919.97/12,609.22
  6. Step 6: Final answer
    x = 5,766.33

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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.