Home / 12,139.26-18,221.85-5,218.62

Finding the Fourth Proportional to 12,139.26, 18,221.85 and 5,218.62

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Solution

The fourth proportional to 12,139.26, 18,221.85 and 5,218.62 is: 7,833.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.26 : 18,221.85 = 5,218.62 : x
  2. Step 2: Convert to fraction form
    12,139.26/18,221.85 = 5,218.62/x
  3. Step 3: Cross multiply
    12,139.26x = 18,221.85 × 5,218.62
  4. Step 4: Simplify right side
    12,139.26x = 95,092,910.85
  5. Step 5: Solve for x
    x = 95,092,910.85/12,139.26
  6. Step 6: Final answer
    x = 7,833.50

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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.