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Finding the Fourth Proportional to 10,992.68, 16,489.80 and 3,976.85

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Solution

The fourth proportional to 10,992.68, 16,489.80 and 3,976.85 is: 5,965.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,992.68 : 16,489.80 = 3,976.85 : x
  2. Step 2: Convert to fraction form
    10,992.68/16,489.80 = 3,976.85/x
  3. Step 3: Cross multiply
    10,992.68x = 16,489.80 × 3,976.85
  4. Step 4: Simplify right side
    10,992.68x = 65,577,461.13
  5. Step 5: Solve for x
    x = 65,577,461.13/10,992.68
  6. Step 6: Final answer
    x = 5,965.56

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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.