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Finding the Fourth Proportional to 6,920.78, 9,550.64 and 3,936.63

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Solution

The fourth proportional to 6,920.78, 9,550.64 and 3,936.63 is: 5,432.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920.78 : 9,550.64 = 3,936.63 : x
  2. Step 2: Convert to fraction form
    6,920.78/9,550.64 = 3,936.63/x
  3. Step 3: Cross multiply
    6,920.78x = 9,550.64 × 3,936.63
  4. Step 4: Simplify right side
    6,920.78x = 37,597,381.60
  5. Step 5: Solve for x
    x = 37,597,381.60/6,920.78
  6. Step 6: Final answer
    x = 5,432.54

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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.