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Finding the Third Proportional to 7.12 and 10.20

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Solution

The third proportional to 7.12 and 10.20 is: 14.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.12 : 10.20 = 10.20 : x
  2. Step 2: Convert to fraction form
    7.12/10.20 = 10.20/x
  3. Step 3: Cross multiply
    7.12x = 10.20 × 10.20
  4. Step 4: Simplify right side
    7.12x = 104.12
  5. Step 5: Solve for x
    x = 104.12/7.12
  6. Step 6: Final answer
    x = 14.63

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.