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Finding the Fourth Proportional to 18.63, 25.67 and 14.55

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Solution

The fourth proportional to 18.63, 25.67 and 14.55 is: 20.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.63 : 25.67 = 14.55 : x
  2. Step 2: Convert to fraction form
    18.63/25.67 = 14.55/x
  3. Step 3: Cross multiply
    18.63x = 25.67 × 14.55
  4. Step 4: Simplify right side
    18.63x = 373.43
  5. Step 5: Solve for x
    x = 373.43/18.63
  6. Step 6: Final answer
    x = 20.04

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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.