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Finding the Fourth Proportional to 12,930.28, 17,842.43 and 8,680.48

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Solution

The fourth proportional to 12,930.28, 17,842.43 and 8,680.48 is: 11,978.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,930.28 : 17,842.43 = 8,680.48 : x
  2. Step 2: Convert to fraction form
    12,930.28/17,842.43 = 8,680.48/x
  3. Step 3: Cross multiply
    12,930.28x = 17,842.43 × 8,680.48
  4. Step 4: Simplify right side
    12,930.28x = 154,880,856.77
  5. Step 5: Solve for x
    x = 154,880,856.77/12,930.28
  6. Step 6: Final answer
    x = 11,978.15

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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.