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Finding the Fourth Proportional to 40,335.40, 60,452.70 and 20,621.80

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Solution

The fourth proportional to 40,335.40, 60,452.70 and 20,621.80 is: 30,906.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,335.40 : 60,452.70 = 20,621.80 : x
  2. Step 2: Convert to fraction form
    40,335.40/60,452.70 = 20,621.80/x
  3. Step 3: Cross multiply
    40,335.40x = 60,452.70 × 20,621.80
  4. Step 4: Simplify right side
    40,335.40x = 1,246,643,488.86
  5. Step 5: Solve for x
    x = 1,246,643,488.86/40,335.40
  6. Step 6: Final answer
    x = 30,906.93

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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.