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Finding the Fourth Proportional to 24.79, 34.16 and 20.17

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Solution

The fourth proportional to 24.79, 34.16 and 20.17 is: 27.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.79 : 34.16 = 20.17 : x
  2. Step 2: Convert to fraction form
    24.79/34.16 = 20.17/x
  3. Step 3: Cross multiply
    24.79x = 34.16 × 20.17
  4. Step 4: Simplify right side
    24.79x = 689.01
  5. Step 5: Solve for x
    x = 689.01/24.79
  6. Step 6: Final answer
    x = 27.80

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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.