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Finding the Fourth Proportional to 12,608.20, 18,913.20 and 3,843.12

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Solution

The fourth proportional to 12,608.20, 18,913.20 and 3,843.12 is: 5,764.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,608.20 : 18,913.20 = 3,843.12 : x
  2. Step 2: Convert to fraction form
    12,608.20/18,913.20 = 3,843.12/x
  3. Step 3: Cross multiply
    12,608.20x = 18,913.20 × 3,843.12
  4. Step 4: Simplify right side
    12,608.20x = 72,685,697.18
  5. Step 5: Solve for x
    x = 72,685,697.18/12,608.20
  6. Step 6: Final answer
    x = 5,764.95

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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.