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Finding the Fourth Proportional to 15,522.97, 21,421.70 and 8,449.44

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Solution

The fourth proportional to 15,522.97, 21,421.70 and 8,449.44 is: 11,660.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,522.97 : 21,421.70 = 8,449.44 : x
  2. Step 2: Convert to fraction form
    15,522.97/21,421.70 = 8,449.44/x
  3. Step 3: Cross multiply
    15,522.97x = 21,421.70 × 8,449.44
  4. Step 4: Simplify right side
    15,522.97x = 181,001,368.85
  5. Step 5: Solve for x
    x = 181,001,368.85/15,522.97
  6. Step 6: Final answer
    x = 11,660.23

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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.