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Finding the Fourth Proportional to 8,680.72, 11,980.20 and 4,954

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Solution

The fourth proportional to 8,680.72, 11,980.20 and 4,954 is: 6,836.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.72 : 11,980.20 = 4,954 : x
  2. Step 2: Convert to fraction form
    8,680.72/11,980.20 = 4,954/x
  3. Step 3: Cross multiply
    8,680.72x = 11,980.20 × 4,954
  4. Step 4: Simplify right side
    8,680.72x = 59,349,910.80
  5. Step 5: Solve for x
    x = 59,349,910.80/8,680.72
  6. Step 6: Final answer
    x = 6,836.98

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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.