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Finding the Fourth Proportional to 28.23, 39 and 23.64

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Solution

The fourth proportional to 28.23, 39 and 23.64 is: 32.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.23 : 39 = 23.64 : x
  2. Step 2: Convert to fraction form
    28.23/39 = 23.64/x
  3. Step 3: Cross multiply
    28.23x = 39 × 23.64
  4. Step 4: Simplify right side
    28.23x = 921.96
  5. Step 5: Solve for x
    x = 921.96/28.23
  6. Step 6: Final answer
    x = 32.66

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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.