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Finding the Fourth Proportional to 20,674.92, 28,530.78 and 11,723.24

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Solution

The fourth proportional to 20,674.92, 28,530.78 and 11,723.24 is: 16,177.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,674.92 : 28,530.78 = 11,723.24 : x
  2. Step 2: Convert to fraction form
    20,674.92/28,530.78 = 11,723.24/x
  3. Step 3: Cross multiply
    20,674.92x = 28,530.78 × 11,723.24
  4. Step 4: Simplify right side
    20,674.92x = 334,473,181.33
  5. Step 5: Solve for x
    x = 334,473,181.33/20,674.92
  6. Step 6: Final answer
    x = 16,177.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.