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Finding the Fourth Proportional to 5,642.73, 7,778.85 and 3,958.92

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Solution

The fourth proportional to 5,642.73, 7,778.85 and 3,958.92 is: 5,457.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,642.73 : 7,778.85 = 3,958.92 : x
  2. Step 2: Convert to fraction form
    5,642.73/7,778.85 = 3,958.92/x
  3. Step 3: Cross multiply
    5,642.73x = 7,778.85 × 3,958.92
  4. Step 4: Simplify right side
    5,642.73x = 30,795,786.15
  5. Step 5: Solve for x
    x = 30,795,786.15/5,642.73
  6. Step 6: Final answer
    x = 5,457.61

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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.