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Finding the Fourth Proportional to 12,659.56, 18,989.34 and 8,028.52

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Solution

The fourth proportional to 12,659.56, 18,989.34 and 8,028.52 is: 12,042.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.56 : 18,989.34 = 8,028.52 : x
  2. Step 2: Convert to fraction form
    12,659.56/18,989.34 = 8,028.52/x
  3. Step 3: Cross multiply
    12,659.56x = 18,989.34 × 8,028.52
  4. Step 4: Simplify right side
    12,659.56x = 152,456,295.98
  5. Step 5: Solve for x
    x = 152,456,295.98/12,659.56
  6. Step 6: Final answer
    x = 12,042.78

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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.