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Finding the Fourth Proportional to 19.96, 30.18 and 19.96

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Solution

The fourth proportional to 19.96, 30.18 and 19.96 is: 30.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.96 : 30.18 = 19.96 : x
  2. Step 2: Convert to fraction form
    19.96/30.18 = 19.96/x
  3. Step 3: Cross multiply
    19.96x = 30.18 × 19.96
  4. Step 4: Simplify right side
    19.96x = 602.39
  5. Step 5: Solve for x
    x = 602.39/19.96
  6. Step 6: Final answer
    x = 30.18

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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.