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Finding the Fourth Proportional to 15,522.84, 21,420.86 and 8,449.25

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Solution

The fourth proportional to 15,522.84, 21,420.86 and 8,449.25 is: 11,659.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,522.84 : 21,420.86 = 8,449.25 : x
  2. Step 2: Convert to fraction form
    15,522.84/21,420.86 = 8,449.25/x
  3. Step 3: Cross multiply
    15,522.84x = 21,420.86 × 8,449.25
  4. Step 4: Simplify right side
    15,522.84x = 180,990,052.00
  5. Step 5: Solve for x
    x = 180,990,052.00/15,522.84
  6. Step 6: Final answer
    x = 11,659.60

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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.