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Finding the Fourth Proportional to 12,246.77, 16,880.36 and 8,212.20

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Solution

The fourth proportional to 12,246.77, 16,880.36 and 8,212.20 is: 11,319.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,246.77 : 16,880.36 = 8,212.20 : x
  2. Step 2: Convert to fraction form
    12,246.77/16,880.36 = 8,212.20/x
  3. Step 3: Cross multiply
    12,246.77x = 16,880.36 × 8,212.20
  4. Step 4: Simplify right side
    12,246.77x = 138,624,851.33
  5. Step 5: Solve for x
    x = 138,624,851.33/12,246.77
  6. Step 6: Final answer
    x = 11,319.30

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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.