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Finding the Fourth Proportional to 12,481.56, 17,220.42 and 8,234.73

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Solution

The fourth proportional to 12,481.56, 17,220.42 and 8,234.73 is: 11,361.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,481.56 : 17,220.42 = 8,234.73 : x
  2. Step 2: Convert to fraction form
    12,481.56/17,220.42 = 8,234.73/x
  3. Step 3: Cross multiply
    12,481.56x = 17,220.42 × 8,234.73
  4. Step 4: Simplify right side
    12,481.56x = 141,805,509.19
  5. Step 5: Solve for x
    x = 141,805,509.19/12,481.56
  6. Step 6: Final answer
    x = 11,361.20

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Half scale
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Double scale
Find fourth proportional to 12,482.56, 17,221.80 and 8,235.73
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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.