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Finding the Fourth Proportional to 20,168.60, 30,251.64 and 6,128.60

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Solution

The fourth proportional to 20,168.60, 30,251.64 and 6,128.60 is: 9,192.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,168.60 : 30,251.64 = 6,128.60 : x
  2. Step 2: Convert to fraction form
    20,168.60/30,251.64 = 6,128.60/x
  3. Step 3: Cross multiply
    20,168.60x = 30,251.64 × 6,128.60
  4. Step 4: Simplify right side
    20,168.60x = 185,400,200.90
  5. Step 5: Solve for x
    x = 185,400,200.90/20,168.60
  6. Step 6: Final answer
    x = 9,192.52

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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.