Home / 12,178.41-18,270.33-3,857.79

Finding the Fourth Proportional to 12,178.41, 18,270.33 and 3,857.79

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Solution

The fourth proportional to 12,178.41, 18,270.33 and 3,857.79 is: 5,787.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,178.41 : 18,270.33 = 3,857.79 : x
  2. Step 2: Convert to fraction form
    12,178.41/18,270.33 = 3,857.79/x
  3. Step 3: Cross multiply
    12,178.41x = 18,270.33 × 3,857.79
  4. Step 4: Simplify right side
    12,178.41x = 70,483,096.37
  5. Step 5: Solve for x
    x = 70,483,096.37/12,178.41
  6. Step 6: Final answer
    x = 5,787.55

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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.