Home / 20,922.75-28,873.40-11,491.92

Finding the Fourth Proportional to 20,922.75, 28,873.40 and 11,491.92

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Solution

The fourth proportional to 20,922.75, 28,873.40 and 11,491.92 is: 15,858.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.75 : 28,873.40 = 11,491.92 : x
  2. Step 2: Convert to fraction form
    20,922.75/28,873.40 = 11,491.92/x
  3. Step 3: Cross multiply
    20,922.75x = 28,873.40 × 11,491.92
  4. Step 4: Simplify right side
    20,922.75x = 331,810,745.47
  5. Step 5: Solve for x
    x = 331,810,745.47/20,922.75
  6. Step 6: Final answer
    x = 15,858.85

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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.