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Finding the Fourth Proportional to 15,154.28, 20,922.24 and 9,781.44

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Solution

The fourth proportional to 15,154.28, 20,922.24 and 9,781.44 is: 13,504.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,154.28 : 20,922.24 = 9,781.44 : x
  2. Step 2: Convert to fraction form
    15,154.28/20,922.24 = 9,781.44/x
  3. Step 3: Cross multiply
    15,154.28x = 20,922.24 × 9,781.44
  4. Step 4: Simplify right side
    15,154.28x = 204,649,635.23
  5. Step 5: Solve for x
    x = 204,649,635.23/15,154.28
  6. Step 6: Final answer
    x = 13,504.42

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.