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Finding the Fourth Proportional to 6,645.92, 9,104.96 and 6,396.80

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Solution

The fourth proportional to 6,645.92, 9,104.96 and 6,396.80 is: 8,763.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,645.92 : 9,104.96 = 6,396.80 : x
  2. Step 2: Convert to fraction form
    6,645.92/9,104.96 = 6,396.80/x
  3. Step 3: Cross multiply
    6,645.92x = 9,104.96 × 6,396.80
  4. Step 4: Simplify right side
    6,645.92x = 58,242,608.13
  5. Step 5: Solve for x
    x = 58,242,608.13/6,645.92
  6. Step 6: Final answer
    x = 8,763.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.