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Finding the Fourth Proportional to 20,319.66, 30,479.49 and 7,163.64

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Solution

The fourth proportional to 20,319.66, 30,479.49 and 7,163.64 is: 10,745.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.66 : 30,479.49 = 7,163.64 : x
  2. Step 2: Convert to fraction form
    20,319.66/30,479.49 = 7,163.64/x
  3. Step 3: Cross multiply
    20,319.66x = 30,479.49 × 7,163.64
  4. Step 4: Simplify right side
    20,319.66x = 218,344,093.74
  5. Step 5: Solve for x
    x = 218,344,093.74/20,319.66
  6. Step 6: Final answer
    x = 10,745.46

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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.