Home / 21,843.44-30,145.20-20,579.84

Finding the Fourth Proportional to 21,843.44, 30,145.20 and 20,579.84

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Solution

The fourth proportional to 21,843.44, 30,145.20 and 20,579.84 is: 28,401.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,843.44 : 30,145.20 = 20,579.84 : x
  2. Step 2: Convert to fraction form
    21,843.44/30,145.20 = 20,579.84/x
  3. Step 3: Cross multiply
    21,843.44x = 30,145.20 × 20,579.84
  4. Step 4: Simplify right side
    21,843.44x = 620,383,392.77
  5. Step 5: Solve for x
    x = 620,383,392.77/21,843.44
  6. Step 6: Final answer
    x = 28,401.36

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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.