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Finding the Third Proportional to 5.13 and 7.69

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Solution

The third proportional to 5.13 and 7.69 is: 11.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.13 : 7.69 = 7.69 : x
  2. Step 2: Convert to fraction form
    5.13/7.69 = 7.69/x
  3. Step 3: Cross multiply
    5.13x = 7.69 × 7.69
  4. Step 4: Simplify right side
    5.13x = 59.10
  5. Step 5: Solve for x
    x = 59.10/5.13
  6. Step 6: Final answer
    x = 11.53

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.