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Finding the Fourth Proportional to 23.99, 32.94 and 21.28

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Solution

The fourth proportional to 23.99, 32.94 and 21.28 is: 29.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.99 : 32.94 = 21.28 : x
  2. Step 2: Convert to fraction form
    23.99/32.94 = 21.28/x
  3. Step 3: Cross multiply
    23.99x = 32.94 × 21.28
  4. Step 4: Simplify right side
    23.99x = 700.96
  5. Step 5: Solve for x
    x = 700.96/23.99
  6. Step 6: Final answer
    x = 29.22

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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.