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Finding the Fourth Proportional to 18,489.62, 27,695.54 and 8,636.78

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Solution

The fourth proportional to 18,489.62, 27,695.54 and 8,636.78 is: 12,937.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,489.62 : 27,695.54 = 8,636.78 : x
  2. Step 2: Convert to fraction form
    18,489.62/27,695.54 = 8,636.78/x
  3. Step 3: Cross multiply
    18,489.62x = 27,695.54 × 8,636.78
  4. Step 4: Simplify right side
    18,489.62x = 239,200,104.30
  5. Step 5: Solve for x
    x = 239,200,104.30/18,489.62
  6. Step 6: Final answer
    x = 12,937.00

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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.