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Finding the Fourth Proportional to 13,311, 19,968.12 and 5,515.56

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Solution

The fourth proportional to 13,311, 19,968.12 and 5,515.56 is: 8,274.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,311 : 19,968.12 = 5,515.56 : x
  2. Step 2: Convert to fraction form
    13,311/19,968.12 = 5,515.56/x
  3. Step 3: Cross multiply
    13,311x = 19,968.12 × 5,515.56
  4. Step 4: Simplify right side
    13,311x = 110,135,363.95
  5. Step 5: Solve for x
    x = 110,135,363.95/13,311
  6. Step 6: Final answer
    x = 8,274.01

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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.