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Finding the Third Proportional to 28,138 and 39,587

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Solution

The third proportional to 28,138 and 39,587 is: 55,694.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,138 : 39,587 = 39,587 : x
  2. Step 2: Convert to fraction form
    28,138/39,587 = 39,587/x
  3. Step 3: Cross multiply
    28,138x = 39,587 × 39,587
  4. Step 4: Simplify right side
    28,138x = 1,567,130,569
  5. Step 5: Solve for x
    x = 1,567,130,569/28,138
  6. Step 6: Final answer
    x = 55,694.45

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.