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Finding the Fourth Proportional to 18.79, 28.14 and 14.83

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Solution

The fourth proportional to 18.79, 28.14 and 14.83 is: 22.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.79 : 28.14 = 14.83 : x
  2. Step 2: Convert to fraction form
    18.79/28.14 = 14.83/x
  3. Step 3: Cross multiply
    18.79x = 28.14 × 14.83
  4. Step 4: Simplify right side
    18.79x = 417.32
  5. Step 5: Solve for x
    x = 417.32/18.79
  6. Step 6: Final answer
    x = 22.21

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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.