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Finding the Fourth Proportional to 12,481.12, 18,725.54 and 7,489.06

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Solution

The fourth proportional to 12,481.12, 18,725.54 and 7,489.06 is: 11,235.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,481.12 : 18,725.54 = 7,489.06 : x
  2. Step 2: Convert to fraction form
    12,481.12/18,725.54 = 7,489.06/x
  3. Step 3: Cross multiply
    12,481.12x = 18,725.54 × 7,489.06
  4. Step 4: Simplify right side
    12,481.12x = 140,236,692.59
  5. Step 5: Solve for x
    x = 140,236,692.59/12,481.12
  6. Step 6: Final answer
    x = 11,235.91

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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.