Home / 12,121.89-18,181.37-3,237.90

Finding the Fourth Proportional to 12,121.89, 18,181.37 and 3,237.90

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Solution

The fourth proportional to 12,121.89, 18,181.37 and 3,237.90 is: 4,856.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.89 : 18,181.37 = 3,237.90 : x
  2. Step 2: Convert to fraction form
    12,121.89/18,181.37 = 3,237.90/x
  3. Step 3: Cross multiply
    12,121.89x = 18,181.37 × 3,237.90
  4. Step 4: Simplify right side
    12,121.89x = 58,869,441.73
  5. Step 5: Solve for x
    x = 58,869,441.73/12,121.89
  6. Step 6: Final answer
    x = 4,856.46

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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.