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Finding the Fourth Proportional to 18,390.44, 27,581.55 and 8,528.44

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Solution

The fourth proportional to 18,390.44, 27,581.55 and 8,528.44 is: 12,790.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.44 : 27,581.55 = 8,528.44 : x
  2. Step 2: Convert to fraction form
    18,390.44/27,581.55 = 8,528.44/x
  3. Step 3: Cross multiply
    18,390.44x = 27,581.55 × 8,528.44
  4. Step 4: Simplify right side
    18,390.44x = 235,227,477.70
  5. Step 5: Solve for x
    x = 235,227,477.70/18,390.44
  6. Step 6: Final answer
    x = 12,790.75

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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.