Home / 12,138.97-18,204.05-4,239.27

Finding the Fourth Proportional to 12,138.97, 18,204.05 and 4,239.27

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Solution

The fourth proportional to 12,138.97, 18,204.05 and 4,239.27 is: 6,357.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.97 : 18,204.05 = 4,239.27 : x
  2. Step 2: Convert to fraction form
    12,138.97/18,204.05 = 4,239.27/x
  3. Step 3: Cross multiply
    12,138.97x = 18,204.05 × 4,239.27
  4. Step 4: Simplify right side
    12,138.97x = 77,171,793.58
  5. Step 5: Solve for x
    x = 77,171,793.58/12,138.97
  6. Step 6: Final answer
    x = 6,357.36

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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.