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Finding the Fourth Proportional to 5,749.38, 7,938 and 3,863.77

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Solution

The fourth proportional to 5,749.38, 7,938 and 3,863.77 is: 5,334.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,749.38 : 7,938 = 3,863.77 : x
  2. Step 2: Convert to fraction form
    5,749.38/7,938 = 3,863.77/x
  3. Step 3: Cross multiply
    5,749.38x = 7,938 × 3,863.77
  4. Step 4: Simplify right side
    5,749.38x = 30,670,586.42
  5. Step 5: Solve for x
    x = 30,670,586.42/5,749.38
  6. Step 6: Final answer
    x = 5,334.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.