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Finding the Fourth Proportional to 12,384.54, 18,578.07 and 3,619.62

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Solution

The fourth proportional to 12,384.54, 18,578.07 and 3,619.62 is: 5,429.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,384.54 : 18,578.07 = 3,619.62 : x
  2. Step 2: Convert to fraction form
    12,384.54/18,578.07 = 3,619.62/x
  3. Step 3: Cross multiply
    12,384.54x = 18,578.07 × 3,619.62
  4. Step 4: Simplify right side
    12,384.54x = 67,245,553.73
  5. Step 5: Solve for x
    x = 67,245,553.73/12,384.54
  6. Step 6: Final answer
    x = 5,429.80

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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.