Home / 12,121.29-18,181.80-3,355.88

Finding the Fourth Proportional to 12,121.29, 18,181.80 and 3,355.88

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Solution

The fourth proportional to 12,121.29, 18,181.80 and 3,355.88 is: 5,033.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.29 : 18,181.80 = 3,355.88 : x
  2. Step 2: Convert to fraction form
    12,121.29/18,181.80 = 3,355.88/x
  3. Step 3: Cross multiply
    12,121.29x = 18,181.80 × 3,355.88
  4. Step 4: Simplify right side
    12,121.29x = 61,015,848.08
  5. Step 5: Solve for x
    x = 61,015,848.08/12,121.29
  6. Step 6: Final answer
    x = 5,033.78

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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.