Home / 20,922.78-28,874.85-11,491.44

Finding the Fourth Proportional to 20,922.78, 28,874.85 and 11,491.44

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Solution

The fourth proportional to 20,922.78, 28,874.85 and 11,491.44 is: 15,858.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.78 : 28,874.85 = 11,491.44 : x
  2. Step 2: Convert to fraction form
    20,922.78/28,874.85 = 11,491.44/x
  3. Step 3: Cross multiply
    20,922.78x = 28,874.85 × 11,491.44
  4. Step 4: Simplify right side
    20,922.78x = 331,813,606.28
  5. Step 5: Solve for x
    x = 331,813,606.28/20,922.78
  6. Step 6: Final answer
    x = 15,858.96

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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.