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Finding the Fourth Proportional to 18,655.44, 27,989.64 and 8,274.48

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Solution

The fourth proportional to 18,655.44, 27,989.64 and 8,274.48 is: 12,414.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,655.44 : 27,989.64 = 8,274.48 : x
  2. Step 2: Convert to fraction form
    18,655.44/27,989.64 = 8,274.48/x
  3. Step 3: Cross multiply
    18,655.44x = 27,989.64 × 8,274.48
  4. Step 4: Simplify right side
    18,655.44x = 231,599,716.39
  5. Step 5: Solve for x
    x = 231,599,716.39/18,655.44
  6. Step 6: Final answer
    x = 12,414.59

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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.