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Finding the Fourth Proportional to 13,512, 20,268 and 4,278

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Solution

The fourth proportional to 13,512, 20,268 and 4,278 is: 6,417

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,512 : 20,268 = 4,278 : x
  2. Step 2: Convert to fraction form
    13,512/20,268 = 4,278/x
  3. Step 3: Cross multiply
    13,512x = 20,268 × 4,278
  4. Step 4: Simplify right side
    13,512x = 86,706,504
  5. Step 5: Solve for x
    x = 86,706,504/13,512
  6. Step 6: Final answer
    x = 6,417

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.