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Finding the Fourth Proportional to 29.90, 41.21 and 19.53

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Solution

The fourth proportional to 29.90, 41.21 and 19.53 is: 26.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.90 : 41.21 = 19.53 : x
  2. Step 2: Convert to fraction form
    29.90/41.21 = 19.53/x
  3. Step 3: Cross multiply
    29.90x = 41.21 × 19.53
  4. Step 4: Simplify right side
    29.90x = 804.73
  5. Step 5: Solve for x
    x = 804.73/29.90
  6. Step 6: Final answer
    x = 26.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.