Home / 12,239.40-18,354.42-3,917.64

Finding the Fourth Proportional to 12,239.40, 18,354.42 and 3,917.64

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Solution

The fourth proportional to 12,239.40, 18,354.42 and 3,917.64 is: 5,874.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.40 : 18,354.42 = 3,917.64 : x
  2. Step 2: Convert to fraction form
    12,239.40/18,354.42 = 3,917.64/x
  3. Step 3: Cross multiply
    12,239.40x = 18,354.42 × 3,917.64
  4. Step 4: Simplify right side
    12,239.40x = 71,906,009.97
  5. Step 5: Solve for x
    x = 71,906,009.97/12,239.40
  6. Step 6: Final answer
    x = 5,874.96

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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.