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Finding the Third Proportional to 9.59 and 21.07

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Solution

The third proportional to 9.59 and 21.07 is: 46.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.59 : 21.07 = 21.07 : x
  2. Step 2: Convert to fraction form
    9.59/21.07 = 21.07/x
  3. Step 3: Cross multiply
    9.59x = 21.07 × 21.07
  4. Step 4: Simplify right side
    9.59x = 443.96
  5. Step 5: Solve for x
    x = 443.96/9.59
  6. Step 6: Final answer
    x = 46.31

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.