Home / 12,121.89-18,174.78-4,727.04

Finding the Fourth Proportional to 12,121.89, 18,174.78 and 4,727.04

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Solution

The fourth proportional to 12,121.89, 18,174.78 and 4,727.04 is: 7,087.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.89 : 18,174.78 = 4,727.04 : x
  2. Step 2: Convert to fraction form
    12,121.89/18,174.78 = 4,727.04/x
  3. Step 3: Cross multiply
    12,121.89x = 18,174.78 × 4,727.04
  4. Step 4: Simplify right side
    12,121.89x = 85,912,912.05
  5. Step 5: Solve for x
    x = 85,912,912.05/12,121.89
  6. Step 6: Final answer
    x = 7,087.42

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1.5x scale

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.