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Finding the Fourth Proportional to 18,636.60, 27,960.12 and 5,488.68

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Solution

The fourth proportional to 18,636.60, 27,960.12 and 5,488.68 is: 8,234.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.60 : 27,960.12 = 5,488.68 : x
  2. Step 2: Convert to fraction form
    18,636.60/27,960.12 = 5,488.68/x
  3. Step 3: Cross multiply
    18,636.60x = 27,960.12 × 5,488.68
  4. Step 4: Simplify right side
    18,636.60x = 153,464,151.44
  5. Step 5: Solve for x
    x = 153,464,151.44/18,636.60
  6. Step 6: Final answer
    x = 8,234.56

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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.