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Finding the Fourth Proportional to 14.23, 21.31 and 10.21

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Solution

The fourth proportional to 14.23, 21.31 and 10.21 is: 15.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.23 : 21.31 = 10.21 : x
  2. Step 2: Convert to fraction form
    14.23/21.31 = 10.21/x
  3. Step 3: Cross multiply
    14.23x = 21.31 × 10.21
  4. Step 4: Simplify right side
    14.23x = 217.58
  5. Step 5: Solve for x
    x = 217.58/14.23
  6. Step 6: Final answer
    x = 15.29

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