Home / 12,121.36-18,182.45-3,355.54

Finding the Fourth Proportional to 12,121.36, 18,182.45 and 3,355.54

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Solution

The fourth proportional to 12,121.36, 18,182.45 and 3,355.54 is: 5,033.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.36 : 18,182.45 = 3,355.54 : x
  2. Step 2: Convert to fraction form
    12,121.36/18,182.45 = 3,355.54/x
  3. Step 3: Cross multiply
    12,121.36x = 18,182.45 × 3,355.54
  4. Step 4: Simplify right side
    12,121.36x = 61,011,938.27
  5. Step 5: Solve for x
    x = 61,011,938.27/12,121.36
  6. Step 6: Final answer
    x = 5,033.42

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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.