Home / 20,380.04-28,123.44-11,996

Finding the Fourth Proportional to 20,380.04, 28,123.44 and 11,996

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Solution

The fourth proportional to 20,380.04, 28,123.44 and 11,996 is: 16,553.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.04 : 28,123.44 = 11,996 : x
  2. Step 2: Convert to fraction form
    20,380.04/28,123.44 = 11,996/x
  3. Step 3: Cross multiply
    20,380.04x = 28,123.44 × 11,996
  4. Step 4: Simplify right side
    20,380.04x = 337,368,786.24
  5. Step 5: Solve for x
    x = 337,368,786.24/20,380.04
  6. Step 6: Final answer
    x = 16,553.88

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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.