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Finding the Fourth Proportional to 22.10, 30.49 and 14.31

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Solution

The fourth proportional to 22.10, 30.49 and 14.31 is: 19.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.10 : 30.49 = 14.31 : x
  2. Step 2: Convert to fraction form
    22.10/30.49 = 14.31/x
  3. Step 3: Cross multiply
    22.10x = 30.49 × 14.31
  4. Step 4: Simplify right side
    22.10x = 436.31
  5. Step 5: Solve for x
    x = 436.31/22.10
  6. Step 6: Final answer
    x = 19.74

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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.