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Finding the Fourth Proportional to 40,394.89, 60,561.12 and 20,394.09

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Solution

The fourth proportional to 40,394.89, 60,561.12 and 20,394.09 is: 30,575.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,394.89 : 60,561.12 = 20,394.09 : x
  2. Step 2: Convert to fraction form
    40,394.89/60,561.12 = 20,394.09/x
  3. Step 3: Cross multiply
    40,394.89x = 60,561.12 × 20,394.09
  4. Step 4: Simplify right side
    40,394.89x = 1,235,088,855.30
  5. Step 5: Solve for x
    x = 1,235,088,855.30/40,394.89
  6. Step 6: Final answer
    x = 30,575.37

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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.