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Finding the Fourth Proportional to 20.93, 29.07 and 20.84

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Solution

The fourth proportional to 20.93, 29.07 and 20.84 is: 28.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.93 : 29.07 = 20.84 : x
  2. Step 2: Convert to fraction form
    20.93/29.07 = 20.84/x
  3. Step 3: Cross multiply
    20.93x = 29.07 × 20.84
  4. Step 4: Simplify right side
    20.93x = 605.67
  5. Step 5: Solve for x
    x = 605.67/20.93
  6. Step 6: Final answer
    x = 28.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.