Home / 18,921.24-28,319.94-13,922.28

Finding the Fourth Proportional to 18,921.24, 28,319.94 and 13,922.28

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Solution

The fourth proportional to 18,921.24, 28,319.94 and 13,922.28 is: 20,837.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.24 : 28,319.94 = 13,922.28 : x
  2. Step 2: Convert to fraction form
    18,921.24/28,319.94 = 13,922.28/x
  3. Step 3: Cross multiply
    18,921.24x = 28,319.94 × 13,922.28
  4. Step 4: Simplify right side
    18,921.24x = 394,278,134.26
  5. Step 5: Solve for x
    x = 394,278,134.26/18,921.24
  6. Step 6: Final answer
    x = 20,837.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.