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Finding the Fourth Proportional to 18,791.58, 25,930.62 and 11,236.38

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Solution

The fourth proportional to 18,791.58, 25,930.62 and 11,236.38 is: 15,505.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.58 : 25,930.62 = 11,236.38 : x
  2. Step 2: Convert to fraction form
    18,791.58/25,930.62 = 11,236.38/x
  3. Step 3: Cross multiply
    18,791.58x = 25,930.62 × 11,236.38
  4. Step 4: Simplify right side
    18,791.58x = 291,366,299.96
  5. Step 5: Solve for x
    x = 291,366,299.96/18,791.58
  6. Step 6: Final answer
    x = 15,505.15

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.