Home / 12,082.53-18,123.81-3,318.75

Finding the Fourth Proportional to 12,082.53, 18,123.81 and 3,318.75

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Solution

The fourth proportional to 12,082.53, 18,123.81 and 3,318.75 is: 4,978.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,082.53 : 18,123.81 = 3,318.75 : x
  2. Step 2: Convert to fraction form
    12,082.53/18,123.81 = 3,318.75/x
  3. Step 3: Cross multiply
    12,082.53x = 18,123.81 × 3,318.75
  4. Step 4: Simplify right side
    12,082.53x = 60,148,394.44
  5. Step 5: Solve for x
    x = 60,148,394.44/12,082.53
  6. Step 6: Final answer
    x = 4,978.13

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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.