Home / 12,178.54-18,269.66-3,855.79

Finding the Fourth Proportional to 12,178.54, 18,269.66 and 3,855.79

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Solution

The fourth proportional to 12,178.54, 18,269.66 and 3,855.79 is: 5,784.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,178.54 : 18,269.66 = 3,855.79 : x
  2. Step 2: Convert to fraction form
    12,178.54/18,269.66 = 3,855.79/x
  3. Step 3: Cross multiply
    12,178.54x = 18,269.66 × 3,855.79
  4. Step 4: Simplify right side
    12,178.54x = 70,443,972.33
  5. Step 5: Solve for x
    x = 70,443,972.33/12,178.54
  6. Step 6: Final answer
    x = 5,784.27

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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.