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Finding the Fourth Proportional to 13,242.89, 18,276.94 and 8,540.84

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Solution

The fourth proportional to 13,242.89, 18,276.94 and 8,540.84 is: 11,787.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,242.89 : 18,276.94 = 8,540.84 : x
  2. Step 2: Convert to fraction form
    13,242.89/18,276.94 = 8,540.84/x
  3. Step 3: Cross multiply
    13,242.89x = 18,276.94 × 8,540.84
  4. Step 4: Simplify right side
    13,242.89x = 156,100,476.60
  5. Step 5: Solve for x
    x = 156,100,476.60/13,242.89
  6. Step 6: Final answer
    x = 11,787.49

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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.