Home / 20,949.84-28,912.17-11,998.56

Finding the Fourth Proportional to 20,949.84, 28,912.17 and 11,998.56

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Solution

The fourth proportional to 20,949.84, 28,912.17 and 11,998.56 is: 16,558.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.84 : 28,912.17 = 11,998.56 : x
  2. Step 2: Convert to fraction form
    20,949.84/28,912.17 = 11,998.56/x
  3. Step 3: Cross multiply
    20,949.84x = 28,912.17 × 11,998.56
  4. Step 4: Simplify right side
    20,949.84x = 346,904,406.48
  5. Step 5: Solve for x
    x = 346,904,406.48/20,949.84
  6. Step 6: Final answer
    x = 16,558.81

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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.