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Finding the Fourth Proportional to 12,491.74, 18,745.11 and 4,993.96

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Solution

The fourth proportional to 12,491.74, 18,745.11 and 4,993.96 is: 7,493.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.74 : 18,745.11 = 4,993.96 : x
  2. Step 2: Convert to fraction form
    12,491.74/18,745.11 = 4,993.96/x
  3. Step 3: Cross multiply
    12,491.74x = 18,745.11 × 4,993.96
  4. Step 4: Simplify right side
    12,491.74x = 93,612,329.54
  5. Step 5: Solve for x
    x = 93,612,329.54/12,491.74
  6. Step 6: Final answer
    x = 7,493.94

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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.