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Finding the Fourth Proportional to 11,320, 16,980 and 3,112

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Solution

The fourth proportional to 11,320, 16,980 and 3,112 is: 4,668

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,320 : 16,980 = 3,112 : x
  2. Step 2: Convert to fraction form
    11,320/16,980 = 3,112/x
  3. Step 3: Cross multiply
    11,320x = 16,980 × 3,112
  4. Step 4: Simplify right side
    11,320x = 52,841,760
  5. Step 5: Solve for x
    x = 52,841,760/11,320
  6. Step 6: Final answer
    x = 4,668

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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.