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Finding the Fourth Proportional to 18,288.60, 27,424.90 and 8,424.60

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Solution

The fourth proportional to 18,288.60, 27,424.90 and 8,424.60 is: 12,633.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,288.60 : 27,424.90 = 8,424.60 : x
  2. Step 2: Convert to fraction form
    18,288.60/27,424.90 = 8,424.60/x
  3. Step 3: Cross multiply
    18,288.60x = 27,424.90 × 8,424.60
  4. Step 4: Simplify right side
    18,288.60x = 231,043,812.54
  5. Step 5: Solve for x
    x = 231,043,812.54/18,288.60
  6. Step 6: Final answer
    x = 12,633.21

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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.