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Finding the Fourth Proportional to 6,645.67, 9,104.61 and 6,396.55

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Solution

The fourth proportional to 6,645.67, 9,104.61 and 6,396.55 is: 8,763.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,645.67 : 9,104.61 = 6,396.55 : x
  2. Step 2: Convert to fraction form
    6,645.67/9,104.61 = 6,396.55/x
  3. Step 3: Cross multiply
    6,645.67x = 9,104.61 × 6,396.55
  4. Step 4: Simplify right side
    6,645.67x = 58,238,093.10
  5. Step 5: Solve for x
    x = 58,238,093.10/6,645.67
  6. Step 6: Final answer
    x = 8,763.31

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Double scale
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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.