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Finding the Fourth Proportional to 14.78, 20.25 and 14.58

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Solution

The fourth proportional to 14.78, 20.25 and 14.58 is: 19.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.78 : 20.25 = 14.58 : x
  2. Step 2: Convert to fraction form
    14.78/20.25 = 14.58/x
  3. Step 3: Cross multiply
    14.78x = 20.25 × 14.58
  4. Step 4: Simplify right side
    14.78x = 295.25
  5. Step 5: Solve for x
    x = 295.25/14.78
  6. Step 6: Final answer
    x = 19.98

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These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.