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Finding the Fourth Proportional to 20,502.68, 30,759.60 and 6,651.68

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Solution

The fourth proportional to 20,502.68, 30,759.60 and 6,651.68 is: 9,979.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,502.68 : 30,759.60 = 6,651.68 : x
  2. Step 2: Convert to fraction form
    20,502.68/30,759.60 = 6,651.68/x
  3. Step 3: Cross multiply
    20,502.68x = 30,759.60 × 6,651.68
  4. Step 4: Simplify right side
    20,502.68x = 204,603,016.13
  5. Step 5: Solve for x
    x = 204,603,016.13/20,502.68
  6. Step 6: Final answer
    x = 9,979.33

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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.