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Finding the Fourth Proportional to 7,771.61, 10,724.51 and 4,234.79

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Solution

The fourth proportional to 7,771.61, 10,724.51 and 4,234.79 is: 5,843.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,771.61 : 10,724.51 = 4,234.79 : x
  2. Step 2: Convert to fraction form
    7,771.61/10,724.51 = 4,234.79/x
  3. Step 3: Cross multiply
    7,771.61x = 10,724.51 × 4,234.79
  4. Step 4: Simplify right side
    7,771.61x = 45,415,972.91
  5. Step 5: Solve for x
    x = 45,415,972.91/7,771.61
  6. Step 6: Final answer
    x = 5,843.83

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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.