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Finding the Fourth Proportional to 18,343.80, 27,504.09 and 8,486.10

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Solution

The fourth proportional to 18,343.80, 27,504.09 and 8,486.10 is: 12,723.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,343.80 : 27,504.09 = 8,486.10 : x
  2. Step 2: Convert to fraction form
    18,343.80/27,504.09 = 8,486.10/x
  3. Step 3: Cross multiply
    18,343.80x = 27,504.09 × 8,486.10
  4. Step 4: Simplify right side
    18,343.80x = 233,402,458.15
  5. Step 5: Solve for x
    x = 233,402,458.15/18,343.80
  6. Step 6: Final answer
    x = 12,723.78

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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.