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Finding the Fourth Proportional to 19.73, 29.58 and 8.31

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Solution

The fourth proportional to 19.73, 29.58 and 8.31 is: 12.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.73 : 29.58 = 8.31 : x
  2. Step 2: Convert to fraction form
    19.73/29.58 = 8.31/x
  3. Step 3: Cross multiply
    19.73x = 29.58 × 8.31
  4. Step 4: Simplify right side
    19.73x = 245.81
  5. Step 5: Solve for x
    x = 245.81/19.73
  6. Step 6: Final answer
    x = 12.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.