Home / 12,121.62-18,164.19-8,212.50

Finding the Fourth Proportional to 12,121.62, 18,164.19 and 8,212.50

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Solution

The fourth proportional to 12,121.62, 18,164.19 and 8,212.50 is: 12,306.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.62 : 18,164.19 = 8,212.50 : x
  2. Step 2: Convert to fraction form
    12,121.62/18,164.19 = 8,212.50/x
  3. Step 3: Cross multiply
    12,121.62x = 18,164.19 × 8,212.50
  4. Step 4: Simplify right side
    12,121.62x = 149,173,410.38
  5. Step 5: Solve for x
    x = 149,173,410.38/12,121.62
  6. Step 6: Final answer
    x = 12,306.39

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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.