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Finding the Fourth Proportional to 5,127.96, 7,691.94 and 3,959.67

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Solution

The fourth proportional to 5,127.96, 7,691.94 and 3,959.67 is: 5,939.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,127.96 : 7,691.94 = 3,959.67 : x
  2. Step 2: Convert to fraction form
    5,127.96/7,691.94 = 3,959.67/x
  3. Step 3: Cross multiply
    5,127.96x = 7,691.94 × 3,959.67
  4. Step 4: Simplify right side
    5,127.96x = 30,457,544.06
  5. Step 5: Solve for x
    x = 30,457,544.06/5,127.96
  6. Step 6: Final answer
    x = 5,939.51

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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.