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Finding the Third Proportional to 25,530 and 39,431

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Solution

The third proportional to 25,530 and 39,431 is: 60,901.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,530 : 39,431 = 39,431 : x
  2. Step 2: Convert to fraction form
    25,530/39,431 = 39,431/x
  3. Step 3: Cross multiply
    25,530x = 39,431 × 39,431
  4. Step 4: Simplify right side
    25,530x = 1,554,803,761
  5. Step 5: Solve for x
    x = 1,554,803,761/25,530
  6. Step 6: Final answer
    x = 60,901.05

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.