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Finding the Fourth Proportional to 24.79, 34.04 and 20.69

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Solution

The fourth proportional to 24.79, 34.04 and 20.69 is: 28.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.79 : 34.04 = 20.69 : x
  2. Step 2: Convert to fraction form
    24.79/34.04 = 20.69/x
  3. Step 3: Cross multiply
    24.79x = 34.04 × 20.69
  4. Step 4: Simplify right side
    24.79x = 704.17
  5. Step 5: Solve for x
    x = 704.17/24.79
  6. Step 6: Final answer
    x = 28.41

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Find fourth proportional to 12.39, 17.02 and 10.34
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1.5x scale

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.