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Finding the Fourth Proportional to 40,662.20, 60,944.70 and 20,930.60

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Solution

The fourth proportional to 40,662.20, 60,944.70 and 20,930.60 is: 31,370.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,662.20 : 60,944.70 = 20,930.60 : x
  2. Step 2: Convert to fraction form
    40,662.20/60,944.70 = 20,930.60/x
  3. Step 3: Cross multiply
    40,662.20x = 60,944.70 × 20,930.60
  4. Step 4: Simplify right side
    40,662.20x = 1,275,609,137.82
  5. Step 5: Solve for x
    x = 1,275,609,137.82/40,662.20
  6. Step 6: Final answer
    x = 31,370.88

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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.