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Finding the Fourth Proportional to 25.64, 38.46 and 14.23

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Solution

The fourth proportional to 25.64, 38.46 and 14.23 is: 21.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.64 : 38.46 = 14.23 : x
  2. Step 2: Convert to fraction form
    25.64/38.46 = 14.23/x
  3. Step 3: Cross multiply
    25.64x = 38.46 × 14.23
  4. Step 4: Simplify right side
    25.64x = 547.09
  5. Step 5: Solve for x
    x = 547.09/25.64
  6. Step 6: Final answer
    x = 21.34

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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.