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Finding the Fourth Proportional to 18.24, 25.12 and 14.12

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Solution

The fourth proportional to 18.24, 25.12 and 14.12 is: 19.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.24 : 25.12 = 14.12 : x
  2. Step 2: Convert to fraction form
    18.24/25.12 = 14.12/x
  3. Step 3: Cross multiply
    18.24x = 25.12 × 14.12
  4. Step 4: Simplify right side
    18.24x = 354.69
  5. Step 5: Solve for x
    x = 354.69/18.24
  6. Step 6: Final answer
    x = 19.45

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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.