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Finding the Fourth Proportional to 12,579.46, 18,871.46 and 5,179.88

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Solution

The fourth proportional to 12,579.46, 18,871.46 and 5,179.88 is: 7,770.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.46 : 18,871.46 = 5,179.88 : x
  2. Step 2: Convert to fraction form
    12,579.46/18,871.46 = 5,179.88/x
  3. Step 3: Cross multiply
    12,579.46x = 18,871.46 × 5,179.88
  4. Step 4: Simplify right side
    12,579.46x = 97,751,968.07
  5. Step 5: Solve for x
    x = 97,751,968.07/12,579.46
  6. Step 6: Final answer
    x = 7,770.76

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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.