Home / 20,822.05-28,735.11-11,869.39

Finding the Fourth Proportional to 20,822.05, 28,735.11 and 11,869.39

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Solution

The fourth proportional to 20,822.05, 28,735.11 and 11,869.39 is: 16,380.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.05 : 28,735.11 = 11,869.39 : x
  2. Step 2: Convert to fraction form
    20,822.05/28,735.11 = 11,869.39/x
  3. Step 3: Cross multiply
    20,822.05x = 28,735.11 × 11,869.39
  4. Step 4: Simplify right side
    20,822.05x = 341,068,227.28
  5. Step 5: Solve for x
    x = 341,068,227.28/20,822.05
  6. Step 6: Final answer
    x = 16,380.15

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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.