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Finding the Fourth Proportional to 18,455.58, 27,678.92 and 8,589.78

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Solution

The fourth proportional to 18,455.58, 27,678.92 and 8,589.78 is: 12,882.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,455.58 : 27,678.92 = 8,589.78 : x
  2. Step 2: Convert to fraction form
    18,455.58/27,678.92 = 8,589.78/x
  3. Step 3: Cross multiply
    18,455.58x = 27,678.92 × 8,589.78
  4. Step 4: Simplify right side
    18,455.58x = 237,755,790.49
  5. Step 5: Solve for x
    x = 237,755,790.49/18,455.58
  6. Step 6: Final answer
    x = 12,882.60

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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.