Home / 12,318.81-18,481.12-3,998.80

Finding the Fourth Proportional to 12,318.81, 18,481.12 and 3,998.80

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Solution

The fourth proportional to 12,318.81, 18,481.12 and 3,998.80 is: 5,999.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.81 : 18,481.12 = 3,998.80 : x
  2. Step 2: Convert to fraction form
    12,318.81/18,481.12 = 3,998.80/x
  3. Step 3: Cross multiply
    12,318.81x = 18,481.12 × 3,998.80
  4. Step 4: Simplify right side
    12,318.81x = 73,902,282.66
  5. Step 5: Solve for x
    x = 73,902,282.66/12,318.81
  6. Step 6: Final answer
    x = 5,999.14

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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.