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Finding the Fourth Proportional to 12,295.20, 18,439.20 and 4,396.80

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Solution

The fourth proportional to 12,295.20, 18,439.20 and 4,396.80 is: 6,593.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,295.20 : 18,439.20 = 4,396.80 : x
  2. Step 2: Convert to fraction form
    12,295.20/18,439.20 = 4,396.80/x
  3. Step 3: Cross multiply
    12,295.20x = 18,439.20 × 4,396.80
  4. Step 4: Simplify right side
    12,295.20x = 81,073,474.56
  5. Step 5: Solve for x
    x = 81,073,474.56/12,295.20
  6. Step 6: Final answer
    x = 6,593.91

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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.