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Finding the Fourth Proportional to 19.98, 30.10 and 16.62

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Solution

The fourth proportional to 19.98, 30.10 and 16.62 is: 25.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.98 : 30.10 = 16.62 : x
  2. Step 2: Convert to fraction form
    19.98/30.10 = 16.62/x
  3. Step 3: Cross multiply
    19.98x = 30.10 × 16.62
  4. Step 4: Simplify right side
    19.98x = 500.26
  5. Step 5: Solve for x
    x = 500.26/19.98
  6. Step 6: Final answer
    x = 25.04

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.