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Finding the Fourth Proportional to 6,645.62, 9,170.76 and 3,620.82

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Solution

The fourth proportional to 6,645.62, 9,170.76 and 3,620.82 is: 4,996.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,645.62 : 9,170.76 = 3,620.82 : x
  2. Step 2: Convert to fraction form
    6,645.62/9,170.76 = 3,620.82/x
  3. Step 3: Cross multiply
    6,645.62x = 9,170.76 × 3,620.82
  4. Step 4: Simplify right side
    6,645.62x = 33,205,671.22
  5. Step 5: Solve for x
    x = 33,205,671.22/6,645.62
  6. Step 6: Final answer
    x = 4,996.63

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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.