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Finding the Fourth Proportional to 18,502.69, 27,758.13 and 8,636.58

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Solution

The fourth proportional to 18,502.69, 27,758.13 and 8,636.58 is: 12,956.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,502.69 : 27,758.13 = 8,636.58 : x
  2. Step 2: Convert to fraction form
    18,502.69/27,758.13 = 8,636.58/x
  3. Step 3: Cross multiply
    18,502.69x = 27,758.13 × 8,636.58
  4. Step 4: Simplify right side
    18,502.69x = 239,735,310.40
  5. Step 5: Solve for x
    x = 239,735,310.40/18,502.69
  6. Step 6: Final answer
    x = 12,956.78

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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.