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Finding the Fourth Proportional to 5,647.94, 7,793.76 and 3,129.80

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Solution

The fourth proportional to 5,647.94, 7,793.76 and 3,129.80 is: 4,318.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,647.94 : 7,793.76 = 3,129.80 : x
  2. Step 2: Convert to fraction form
    5,647.94/7,793.76 = 3,129.80/x
  3. Step 3: Cross multiply
    5,647.94x = 7,793.76 × 3,129.80
  4. Step 4: Simplify right side
    5,647.94x = 24,392,910.05
  5. Step 5: Solve for x
    x = 24,392,910.05/5,647.94
  6. Step 6: Final answer
    x = 4,318.90

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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.