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Finding the Third Proportional to 7,312 and 15,718

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Solution

The third proportional to 7,312 and 15,718 is: 33,787.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,312 : 15,718 = 15,718 : x
  2. Step 2: Convert to fraction form
    7,312/15,718 = 15,718/x
  3. Step 3: Cross multiply
    7,312x = 15,718 × 15,718
  4. Step 4: Simplify right side
    7,312x = 247,055,524
  5. Step 5: Solve for x
    x = 247,055,524/7,312
  6. Step 6: Final answer
    x = 33,787.68

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.