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Finding the Third Proportional to 4.87 and 10.15

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Solution

The third proportional to 4.87 and 10.15 is: 21.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.87 : 10.15 = 10.15 : x
  2. Step 2: Convert to fraction form
    4.87/10.15 = 10.15/x
  3. Step 3: Cross multiply
    4.87x = 10.15 × 10.15
  4. Step 4: Simplify right side
    4.87x = 102.98
  5. Step 5: Solve for x
    x = 102.98/4.87
  6. Step 6: Final answer
    x = 21.14

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.