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Finding the Fourth Proportional to 24.98, 34.46 and 15.78

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Solution

The fourth proportional to 24.98, 34.46 and 15.78 is: 21.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.98 : 34.46 = 15.78 : x
  2. Step 2: Convert to fraction form
    24.98/34.46 = 15.78/x
  3. Step 3: Cross multiply
    24.98x = 34.46 × 15.78
  4. Step 4: Simplify right side
    24.98x = 543.70
  5. Step 5: Solve for x
    x = 543.70/24.98
  6. Step 6: Final answer
    x = 21.77

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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.