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Finding the Fourth Proportional to 40,850.79, 61,268.90 and 10,865.21

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Solution

The fourth proportional to 40,850.79, 61,268.90 and 10,865.21 is: 16,295.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,850.79 : 61,268.90 = 10,865.21 : x
  2. Step 2: Convert to fraction form
    40,850.79/61,268.90 = 10,865.21/x
  3. Step 3: Cross multiply
    40,850.79x = 61,268.90 × 10,865.21
  4. Step 4: Simplify right side
    40,850.79x = 665,699,104.30
  5. Step 5: Solve for x
    x = 665,699,104.30/40,850.79
  6. Step 6: Final answer
    x = 16,295.87

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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.