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Finding the Fourth Proportional to 10,939.86, 16,412.94 and 5,394.90

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Solution

The fourth proportional to 10,939.86, 16,412.94 and 5,394.90 is: 8,093.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,939.86 : 16,412.94 = 5,394.90 : x
  2. Step 2: Convert to fraction form
    10,939.86/16,412.94 = 5,394.90/x
  3. Step 3: Cross multiply
    10,939.86x = 16,412.94 × 5,394.90
  4. Step 4: Simplify right side
    10,939.86x = 88,546,170.01
  5. Step 5: Solve for x
    x = 88,546,170.01/10,939.86
  6. Step 6: Final answer
    x = 8,093.90

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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.