Home / 20,997.11-31,500.32-11,650.92

Finding the Fourth Proportional to 20,997.11, 31,500.32 and 11,650.92

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Solution

The fourth proportional to 20,997.11, 31,500.32 and 11,650.92 is: 17,478.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.11 : 31,500.32 = 11,650.92 : x
  2. Step 2: Convert to fraction form
    20,997.11/31,500.32 = 11,650.92/x
  3. Step 3: Cross multiply
    20,997.11x = 31,500.32 × 11,650.92
  4. Step 4: Simplify right side
    20,997.11x = 367,007,650.04
  5. Step 5: Solve for x
    x = 367,007,650.04/20,997.11
  6. Step 6: Final answer
    x = 17,478.96

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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.