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Finding the Fourth Proportional to 18,606.80, 27,913.80 and 8,218.52

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Solution

The fourth proportional to 18,606.80, 27,913.80 and 8,218.52 is: 12,329.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,606.80 : 27,913.80 = 8,218.52 : x
  2. Step 2: Convert to fraction form
    18,606.80/27,913.80 = 8,218.52/x
  3. Step 3: Cross multiply
    18,606.80x = 27,913.80 × 8,218.52
  4. Step 4: Simplify right side
    18,606.80x = 229,410,123.58
  5. Step 5: Solve for x
    x = 229,410,123.58/18,606.80
  6. Step 6: Final answer
    x = 12,329.37

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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.