Home / 8,645.40-11,930.82-5,108.61

Finding the Fourth Proportional to 8,645.40, 11,930.82 and 5,108.61

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Solution

The fourth proportional to 8,645.40, 11,930.82 and 5,108.61 is: 7,049.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.40 : 11,930.82 = 5,108.61 : x
  2. Step 2: Convert to fraction form
    8,645.40/11,930.82 = 5,108.61/x
  3. Step 3: Cross multiply
    8,645.40x = 11,930.82 × 5,108.61
  4. Step 4: Simplify right side
    8,645.40x = 60,949,906.36
  5. Step 5: Solve for x
    x = 60,949,906.36/8,645.40
  6. Step 6: Final answer
    x = 7,049.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.