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Finding the Fourth Proportional to 10,879.87, 16,318.69 and 3,489.63

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Solution

The fourth proportional to 10,879.87, 16,318.69 and 3,489.63 is: 5,234.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,879.87 : 16,318.69 = 3,489.63 : x
  2. Step 2: Convert to fraction form
    10,879.87/16,318.69 = 3,489.63/x
  3. Step 3: Cross multiply
    10,879.87x = 16,318.69 × 3,489.63
  4. Step 4: Simplify right side
    10,879.87x = 56,946,181.46
  5. Step 5: Solve for x
    x = 56,946,181.46/10,879.87
  6. Step 6: Final answer
    x = 5,234.09

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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.