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Finding the Fourth Proportional to 23.96, 32.88 and 21.31

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Solution

The fourth proportional to 23.96, 32.88 and 21.31 is: 29.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.96 : 32.88 = 21.31 : x
  2. Step 2: Convert to fraction form
    23.96/32.88 = 21.31/x
  3. Step 3: Cross multiply
    23.96x = 32.88 × 21.31
  4. Step 4: Simplify right side
    23.96x = 700.67
  5. Step 5: Solve for x
    x = 700.67/23.96
  6. Step 6: Final answer
    x = 29.24

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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.