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Finding the Fourth Proportional to 17.70, 26.46 and 13.68

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Solution

The fourth proportional to 17.70, 26.46 and 13.68 is: 20.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.70 : 26.46 = 13.68 : x
  2. Step 2: Convert to fraction form
    17.70/26.46 = 13.68/x
  3. Step 3: Cross multiply
    17.70x = 26.46 × 13.68
  4. Step 4: Simplify right side
    17.70x = 361.97
  5. Step 5: Solve for x
    x = 361.97/17.70
  6. Step 6: Final answer
    x = 20.45

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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.