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Finding the Fourth Proportional to 14.31, 21.37 and 12.29

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Solution

The fourth proportional to 14.31, 21.37 and 12.29 is: 18.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.31 : 21.37 = 12.29 : x
  2. Step 2: Convert to fraction form
    14.31/21.37 = 12.29/x
  3. Step 3: Cross multiply
    14.31x = 21.37 × 12.29
  4. Step 4: Simplify right side
    14.31x = 262.59
  5. Step 5: Solve for x
    x = 262.59/14.31
  6. Step 6: Final answer
    x = 18.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.