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Finding the Fourth Proportional to 17.40, 23.90 and 16.47

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Solution

The fourth proportional to 17.40, 23.90 and 16.47 is: 22.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.40 : 23.90 = 16.47 : x
  2. Step 2: Convert to fraction form
    17.40/23.90 = 16.47/x
  3. Step 3: Cross multiply
    17.40x = 23.90 × 16.47
  4. Step 4: Simplify right side
    17.40x = 393.55
  5. Step 5: Solve for x
    x = 393.55/17.40
  6. Step 6: Final answer
    x = 22.62

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.