Home / 21.20-29.25-14.73

Finding the Fourth Proportional to 21.20, 29.25 and 14.73

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Solution

The fourth proportional to 21.20, 29.25 and 14.73 is: 20.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.20 : 29.25 = 14.73 : x
  2. Step 2: Convert to fraction form
    21.20/29.25 = 14.73/x
  3. Step 3: Cross multiply
    21.20x = 29.25 × 14.73
  4. Step 4: Simplify right side
    21.20x = 430.85
  5. Step 5: Solve for x
    x = 430.85/21.20
  6. Step 6: Final answer
    x = 20.33

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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.