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Finding the Third Proportional to 7,215 and 15,321

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Solution

The third proportional to 7,215 and 15,321 is: 32,534.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215 : 15,321 = 15,321 : x
  2. Step 2: Convert to fraction form
    7,215/15,321 = 15,321/x
  3. Step 3: Cross multiply
    7,215x = 15,321 × 15,321
  4. Step 4: Simplify right side
    7,215x = 234,733,041
  5. Step 5: Solve for x
    x = 234,733,041/7,215
  6. Step 6: Final answer
    x = 32,534.03

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.