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Finding the Third Proportional to 7,988 and 12,792

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Solution

The third proportional to 7,988 and 12,792 is: 20,485.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,988 : 12,792 = 12,792 : x
  2. Step 2: Convert to fraction form
    7,988/12,792 = 12,792/x
  3. Step 3: Cross multiply
    7,988x = 12,792 × 12,792
  4. Step 4: Simplify right side
    7,988x = 163,635,264
  5. Step 5: Solve for x
    x = 163,635,264/7,988
  6. Step 6: Final answer
    x = 20,485.14

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.