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Finding the Fourth Proportional to 8,680.24, 11,979 and 4,954

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Solution

The fourth proportional to 8,680.24, 11,979 and 4,954 is: 6,836.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.24 : 11,979 = 4,954 : x
  2. Step 2: Convert to fraction form
    8,680.24/11,979 = 4,954/x
  3. Step 3: Cross multiply
    8,680.24x = 11,979 × 4,954
  4. Step 4: Simplify right side
    8,680.24x = 59,343,966
  5. Step 5: Solve for x
    x = 59,343,966/8,680.24
  6. Step 6: Final answer
    x = 6,836.67

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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.