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Finding the Fourth Proportional to 13,608, 20,412 and 4,374

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Solution

The fourth proportional to 13,608, 20,412 and 4,374 is: 6,561

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608 : 20,412 = 4,374 : x
  2. Step 2: Convert to fraction form
    13,608/20,412 = 4,374/x
  3. Step 3: Cross multiply
    13,608x = 20,412 × 4,374
  4. Step 4: Simplify right side
    13,608x = 89,282,088
  5. Step 5: Solve for x
    x = 89,282,088/13,608
  6. Step 6: Final answer
    x = 6,561

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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.