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Finding the Fourth Proportional to 12.06, 16.63 and 9.63

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Solution

The fourth proportional to 12.06, 16.63 and 9.63 is: 13.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12.06 : 16.63 = 9.63 : x
  2. Step 2: Convert to fraction form
    12.06/16.63 = 9.63/x
  3. Step 3: Cross multiply
    12.06x = 16.63 × 9.63
  4. Step 4: Simplify right side
    12.06x = 160.15
  5. Step 5: Solve for x
    x = 160.15/12.06
  6. Step 6: Final answer
    x = 13.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.