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Finding the Fourth Proportional to 7,906.69, 11,861.98 and 2,642.25

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Solution

The fourth proportional to 7,906.69, 11,861.98 and 2,642.25 is: 3,964.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,906.69 : 11,861.98 = 2,642.25 : x
  2. Step 2: Convert to fraction form
    7,906.69/11,861.98 = 2,642.25/x
  3. Step 3: Cross multiply
    7,906.69x = 11,861.98 × 2,642.25
  4. Step 4: Simplify right side
    7,906.69x = 31,342,354.53
  5. Step 5: Solve for x
    x = 31,342,354.53/7,906.69
  6. Step 6: Final answer
    x = 3,964.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.