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Finding the Fourth Proportional to 18,550.81, 27,819.81 and 12,343.49

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Solution

The fourth proportional to 18,550.81, 27,819.81 and 12,343.49 is: 18,510.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,550.81 : 27,819.81 = 12,343.49 : x
  2. Step 2: Convert to fraction form
    18,550.81/27,819.81 = 12,343.49/x
  3. Step 3: Cross multiply
    18,550.81x = 27,819.81 × 12,343.49
  4. Step 4: Simplify right side
    18,550.81x = 343,393,511.76
  5. Step 5: Solve for x
    x = 343,393,511.76/18,550.81
  6. Step 6: Final answer
    x = 18,510.97

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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.