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Finding the Fourth Proportional to 12,671.21, 17,481.99 and 8,200.61

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Solution

The fourth proportional to 12,671.21, 17,481.99 and 8,200.61 is: 11,314.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,671.21 : 17,481.99 = 8,200.61 : x
  2. Step 2: Convert to fraction form
    12,671.21/17,481.99 = 8,200.61/x
  3. Step 3: Cross multiply
    12,671.21x = 17,481.99 × 8,200.61
  4. Step 4: Simplify right side
    12,671.21x = 143,362,982.01
  5. Step 5: Solve for x
    x = 143,362,982.01/12,671.21
  6. Step 6: Final answer
    x = 11,314.07

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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.