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Finding the Fourth Proportional to 7,778.78, 10,734.31 and 4,241.91

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Solution

The fourth proportional to 7,778.78, 10,734.31 and 4,241.91 is: 5,853.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,778.78 : 10,734.31 = 4,241.91 : x
  2. Step 2: Convert to fraction form
    7,778.78/10,734.31 = 4,241.91/x
  3. Step 3: Cross multiply
    7,778.78x = 10,734.31 × 4,241.91
  4. Step 4: Simplify right side
    7,778.78x = 45,533,976.93
  5. Step 5: Solve for x
    x = 45,533,976.93/7,778.78
  6. Step 6: Final answer
    x = 5,853.61

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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.