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Finding the Fourth Proportional to 18,115.25, 27,172.87 and 5,636.99

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Solution

The fourth proportional to 18,115.25, 27,172.87 and 5,636.99 is: 8,455.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.25 : 27,172.87 = 5,636.99 : x
  2. Step 2: Convert to fraction form
    18,115.25/27,172.87 = 5,636.99/x
  3. Step 3: Cross multiply
    18,115.25x = 27,172.87 × 5,636.99
  4. Step 4: Simplify right side
    18,115.25x = 153,173,250.30
  5. Step 5: Solve for x
    x = 153,173,250.30/18,115.25
  6. Step 6: Final answer
    x = 8,455.49

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Similar ratio
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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.