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Finding the Fourth Proportional to 12,608.20, 18,915.08 and 3,843.80

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Solution

The fourth proportional to 12,608.20, 18,915.08 and 3,843.80 is: 5,766.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,608.20 : 18,915.08 = 3,843.80 : x
  2. Step 2: Convert to fraction form
    12,608.20/18,915.08 = 3,843.80/x
  3. Step 3: Cross multiply
    12,608.20x = 18,915.08 × 3,843.80
  4. Step 4: Simplify right side
    12,608.20x = 72,705,670.71
  5. Step 5: Solve for x
    x = 72,705,670.71/12,608.20
  6. Step 6: Final answer
    x = 5,766.54

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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.