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Finding the Fourth Proportional to 7,163.70, 10,745.55 and 6,645.30

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Solution

The fourth proportional to 7,163.70, 10,745.55 and 6,645.30 is: 9,967.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,163.70 : 10,745.55 = 6,645.30 : x
  2. Step 2: Convert to fraction form
    7,163.70/10,745.55 = 6,645.30/x
  3. Step 3: Cross multiply
    7,163.70x = 10,745.55 × 6,645.30
  4. Step 4: Simplify right side
    7,163.70x = 71,407,403.42
  5. Step 5: Solve for x
    x = 71,407,403.42/7,163.70
  6. Step 6: Final answer
    x = 9,967.95

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Half scale
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Double scale
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Similar ratio
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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.