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Finding the Fourth Proportional to 20,241.80, 30,346.90 and 12,844.88

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Solution

The fourth proportional to 20,241.80, 30,346.90 and 12,844.88 is: 19,257.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,241.80 : 30,346.90 = 12,844.88 : x
  2. Step 2: Convert to fraction form
    20,241.80/30,346.90 = 12,844.88/x
  3. Step 3: Cross multiply
    20,241.80x = 30,346.90 × 12,844.88
  4. Step 4: Simplify right side
    20,241.80x = 389,802,288.87
  5. Step 5: Solve for x
    x = 389,802,288.87/20,241.80
  6. Step 6: Final answer
    x = 19,257.29

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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.