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Finding the Fourth Proportional to 18,620.69, 27,930.92 and 8,089.34

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Solution

The fourth proportional to 18,620.69, 27,930.92 and 8,089.34 is: 12,133.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.69 : 27,930.92 = 8,089.34 : x
  2. Step 2: Convert to fraction form
    18,620.69/27,930.92 = 8,089.34/x
  3. Step 3: Cross multiply
    18,620.69x = 27,930.92 × 8,089.34
  4. Step 4: Simplify right side
    18,620.69x = 225,942,528.29
  5. Step 5: Solve for x
    x = 225,942,528.29/18,620.69
  6. Step 6: Final answer
    x = 12,133.95

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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.