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Finding the Third Proportional to 28,396 and 39,712

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Solution

The third proportional to 28,396 and 39,712 is: 55,537.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,396 : 39,712 = 39,712 : x
  2. Step 2: Convert to fraction form
    28,396/39,712 = 39,712/x
  3. Step 3: Cross multiply
    28,396x = 39,712 × 39,712
  4. Step 4: Simplify right side
    28,396x = 1,577,042,944
  5. Step 5: Solve for x
    x = 1,577,042,944/28,396
  6. Step 6: Final answer
    x = 55,537.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.