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Finding the Fourth Proportional to 20,568.96, 30,702.96 and 17,665.92

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Solution

The fourth proportional to 20,568.96, 30,702.96 and 17,665.92 is: 26,369.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,568.96 : 30,702.96 = 17,665.92 : x
  2. Step 2: Convert to fraction form
    20,568.96/30,702.96 = 17,665.92/x
  3. Step 3: Cross multiply
    20,568.96x = 30,702.96 × 17,665.92
  4. Step 4: Simplify right side
    20,568.96x = 542,396,035.12
  5. Step 5: Solve for x
    x = 542,396,035.12/20,568.96
  6. Step 6: Final answer
    x = 26,369.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.