Home / 13,857.40-19,122.84-8,481.92

Finding the Fourth Proportional to 13,857.40, 19,122.84 and 8,481.92

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Solution

The fourth proportional to 13,857.40, 19,122.84 and 8,481.92 is: 11,704.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,857.40 : 19,122.84 = 8,481.92 : x
  2. Step 2: Convert to fraction form
    13,857.40/19,122.84 = 8,481.92/x
  3. Step 3: Cross multiply
    13,857.40x = 19,122.84 × 8,481.92
  4. Step 4: Simplify right side
    13,857.40x = 162,198,399.05
  5. Step 5: Solve for x
    x = 162,198,399.05/13,857.40
  6. Step 6: Final answer
    x = 11,704.82

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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.