Home / 21,821.28-32,743.20-10,142.88

Finding the Fourth Proportional to 21,821.28, 32,743.20 and 10,142.88

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Solution

The fourth proportional to 21,821.28, 32,743.20 and 10,142.88 is: 15,219.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,821.28 : 32,743.20 = 10,142.88 : x
  2. Step 2: Convert to fraction form
    21,821.28/32,743.20 = 10,142.88/x
  3. Step 3: Cross multiply
    21,821.28x = 32,743.20 × 10,142.88
  4. Step 4: Simplify right side
    21,821.28x = 332,110,348.42
  5. Step 5: Solve for x
    x = 332,110,348.42/21,821.28
  6. Step 6: Final answer
    x = 15,219.56

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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.