Home / 12,139.38-18,204.66-4,239.68

Finding the Fourth Proportional to 12,139.38, 18,204.66 and 4,239.68

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Solution

The fourth proportional to 12,139.38, 18,204.66 and 4,239.68 is: 6,357.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.38 : 18,204.66 = 4,239.68 : x
  2. Step 2: Convert to fraction form
    12,139.38/18,204.66 = 4,239.68/x
  3. Step 3: Cross multiply
    12,139.38x = 18,204.66 × 4,239.68
  4. Step 4: Simplify right side
    12,139.38x = 77,181,820.69
  5. Step 5: Solve for x
    x = 77,181,820.69/12,139.38
  6. Step 6: Final answer
    x = 6,357.97

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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.