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Finding the Fourth Proportional to 14.45, 19.92 and 14.28

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Solution

The fourth proportional to 14.45, 19.92 and 14.28 is: 19.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.45 : 19.92 = 14.28 : x
  2. Step 2: Convert to fraction form
    14.45/19.92 = 14.28/x
  3. Step 3: Cross multiply
    14.45x = 19.92 × 14.28
  4. Step 4: Simplify right side
    14.45x = 284.44
  5. Step 5: Solve for x
    x = 284.44/14.45
  6. Step 6: Final answer
    x = 19.69

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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.