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Finding the Fourth Proportional to 20.83, 28.53 and 19.60

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Solution

The fourth proportional to 20.83, 28.53 and 19.60 is: 26.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.83 : 28.53 = 19.60 : x
  2. Step 2: Convert to fraction form
    20.83/28.53 = 19.60/x
  3. Step 3: Cross multiply
    20.83x = 28.53 × 19.60
  4. Step 4: Simplify right side
    20.83x = 559.19
  5. Step 5: Solve for x
    x = 559.19/20.83
  6. Step 6: Final answer
    x = 26.85

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Why These Related Problems?

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