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Finding the Fourth Proportional to 6,459.78, 8,912.85 and 3,941.73

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Solution

The fourth proportional to 6,459.78, 8,912.85 and 3,941.73 is: 5,438.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,459.78 : 8,912.85 = 3,941.73 : x
  2. Step 2: Convert to fraction form
    6,459.78/8,912.85 = 3,941.73/x
  3. Step 3: Cross multiply
    6,459.78x = 8,912.85 × 3,941.73
  4. Step 4: Simplify right side
    6,459.78x = 35,132,003.67
  5. Step 5: Solve for x
    x = 35,132,003.67/6,459.78
  6. Step 6: Final answer
    x = 5,438.58

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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.