Home / 11,787.37-17,670.12-3,990.73

Finding the Fourth Proportional to 11,787.37, 17,670.12 and 3,990.73

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Solution

The fourth proportional to 11,787.37, 17,670.12 and 3,990.73 is: 5,982.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,787.37 : 17,670.12 = 3,990.73 : x
  2. Step 2: Convert to fraction form
    11,787.37/17,670.12 = 3,990.73/x
  3. Step 3: Cross multiply
    11,787.37x = 17,670.12 × 3,990.73
  4. Step 4: Simplify right side
    11,787.37x = 70,516,677.99
  5. Step 5: Solve for x
    x = 70,516,677.99/11,787.37
  6. Step 6: Final answer
    x = 5,982.39

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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.