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Finding the Fourth Proportional to 24.70, 34.07 and 15

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Solution

The fourth proportional to 24.70, 34.07 and 15 is: 20.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.70 : 34.07 = 15 : x
  2. Step 2: Convert to fraction form
    24.70/34.07 = 15/x
  3. Step 3: Cross multiply
    24.70x = 34.07 × 15
  4. Step 4: Simplify right side
    24.70x = 511.05
  5. Step 5: Solve for x
    x = 511.05/24.70
  6. Step 6: Final answer
    x = 20.69

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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.