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Finding the Fourth Proportional to 13.55, 20.30 and 9.68

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Solution

The fourth proportional to 13.55, 20.30 and 9.68 is: 14.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.55 : 20.30 = 9.68 : x
  2. Step 2: Convert to fraction form
    13.55/20.30 = 9.68/x
  3. Step 3: Cross multiply
    13.55x = 20.30 × 9.68
  4. Step 4: Simplify right side
    13.55x = 196.50
  5. Step 5: Solve for x
    x = 196.50/13.55
  6. Step 6: Final answer
    x = 14.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.