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Finding the Fourth Proportional to 16.70, 25 and 12.12

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Solution

The fourth proportional to 16.70, 25 and 12.12 is: 18.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.70 : 25 = 12.12 : x
  2. Step 2: Convert to fraction form
    16.70/25 = 12.12/x
  3. Step 3: Cross multiply
    16.70x = 25 × 12.12
  4. Step 4: Simplify right side
    16.70x = 303
  5. Step 5: Solve for x
    x = 303/16.70
  6. Step 6: Final answer
    x = 18.14

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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.