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Finding the Fourth Proportional to 19.92, 27.60 and 18.24

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Solution

The fourth proportional to 19.92, 27.60 and 18.24 is: 25.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.92 : 27.60 = 18.24 : x
  2. Step 2: Convert to fraction form
    19.92/27.60 = 18.24/x
  3. Step 3: Cross multiply
    19.92x = 27.60 × 18.24
  4. Step 4: Simplify right side
    19.92x = 503.42
  5. Step 5: Solve for x
    x = 503.42/19.92
  6. Step 6: Final answer
    x = 25.27

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.