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Finding the Fourth Proportional to 7,908.66, 11,861.33 and 2,978.18

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Solution

The fourth proportional to 7,908.66, 11,861.33 and 2,978.18 is: 4,466.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,908.66 : 11,861.33 = 2,978.18 : x
  2. Step 2: Convert to fraction form
    7,908.66/11,861.33 = 2,978.18/x
  3. Step 3: Cross multiply
    7,908.66x = 11,861.33 × 2,978.18
  4. Step 4: Simplify right side
    7,908.66x = 35,325,175.78
  5. Step 5: Solve for x
    x = 35,325,175.78/7,908.66
  6. Step 6: Final answer
    x = 4,466.64

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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.