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Finding the Third Proportional to 25.39 and 39.63

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Solution

The third proportional to 25.39 and 39.63 is: 61.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.39 : 39.63 = 39.63 : x
  2. Step 2: Convert to fraction form
    25.39/39.63 = 39.63/x
  3. Step 3: Cross multiply
    25.39x = 39.63 × 39.63
  4. Step 4: Simplify right side
    25.39x = 1,570.53
  5. Step 5: Solve for x
    x = 1,570.53/25.39
  6. Step 6: Final answer
    x = 61.85

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.