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Finding the Fourth Proportional to 23.30, 34.80 and 17.28

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Solution

The fourth proportional to 23.30, 34.80 and 17.28 is: 25.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.30 : 34.80 = 17.28 : x
  2. Step 2: Convert to fraction form
    23.30/34.80 = 17.28/x
  3. Step 3: Cross multiply
    23.30x = 34.80 × 17.28
  4. Step 4: Simplify right side
    23.30x = 601.34
  5. Step 5: Solve for x
    x = 601.34/23.30
  6. Step 6: Final answer
    x = 25.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.