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Finding the Fourth Proportional to 20.23, 27.93 and 15.06

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Solution

The fourth proportional to 20.23, 27.93 and 15.06 is: 20.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.23 : 27.93 = 15.06 : x
  2. Step 2: Convert to fraction form
    20.23/27.93 = 15.06/x
  3. Step 3: Cross multiply
    20.23x = 27.93 × 15.06
  4. Step 4: Simplify right side
    20.23x = 420.52
  5. Step 5: Solve for x
    x = 420.52/20.23
  6. Step 6: Final answer
    x = 20.78

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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.