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Finding the Fourth Proportional to 20,170.60, 28,268 and 20,170.60

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Solution

The fourth proportional to 20,170.60, 28,268 and 20,170.60 is: 28,268

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,170.60 : 28,268 = 20,170.60 : x
  2. Step 2: Convert to fraction form
    20,170.60/28,268 = 20,170.60/x
  3. Step 3: Cross multiply
    20,170.60x = 28,268 × 20,170.60
  4. Step 4: Simplify right side
    20,170.60x = 570,182,520.80
  5. Step 5: Solve for x
    x = 570,182,520.80/20,170.60
  6. Step 6: Final answer
    x = 28,268

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.