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Finding the Fourth Proportional to 18.30, 28.14 and 18.30

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Solution

The fourth proportional to 18.30, 28.14 and 18.30 is: 28.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.30 : 28.14 = 18.30 : x
  2. Step 2: Convert to fraction form
    18.30/28.14 = 18.30/x
  3. Step 3: Cross multiply
    18.30x = 28.14 × 18.30
  4. Step 4: Simplify right side
    18.30x = 514.96
  5. Step 5: Solve for x
    x = 514.96/18.30
  6. Step 6: Final answer
    x = 28.14

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.