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Finding the Fourth Proportional to 18,128.81, 27,193.22 and 6,442.49

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Solution

The fourth proportional to 18,128.81, 27,193.22 and 6,442.49 is: 9,663.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,128.81 : 27,193.22 = 6,442.49 : x
  2. Step 2: Convert to fraction form
    18,128.81/27,193.22 = 6,442.49/x
  3. Step 3: Cross multiply
    18,128.81x = 27,193.22 × 6,442.49
  4. Step 4: Simplify right side
    18,128.81x = 175,192,107.85
  5. Step 5: Solve for x
    x = 175,192,107.85/18,128.81
  6. Step 6: Final answer
    x = 9,663.74

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Half scale
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Double scale
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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.