Home / 12,755.64-19,129.62-3,989.88

Finding the Fourth Proportional to 12,755.64, 19,129.62 and 3,989.88

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Solution

The fourth proportional to 12,755.64, 19,129.62 and 3,989.88 is: 5,983.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,755.64 : 19,129.62 = 3,989.88 : x
  2. Step 2: Convert to fraction form
    12,755.64/19,129.62 = 3,989.88/x
  3. Step 3: Cross multiply
    12,755.64x = 19,129.62 × 3,989.88
  4. Step 4: Simplify right side
    12,755.64x = 76,324,888.25
  5. Step 5: Solve for x
    x = 76,324,888.25/12,755.64
  6. Step 6: Final answer
    x = 5,983.62

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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.