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Finding the Fourth Proportional to 12,704.88, 19,086.60 and 12,180

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Solution

The fourth proportional to 12,704.88, 19,086.60 and 12,180 is: 18,298.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,704.88 : 19,086.60 = 12,180 : x
  2. Step 2: Convert to fraction form
    12,704.88/19,086.60 = 12,180/x
  3. Step 3: Cross multiply
    12,704.88x = 19,086.60 × 12,180
  4. Step 4: Simplify right side
    12,704.88x = 232,474,788.00
  5. Step 5: Solve for x
    x = 232,474,788.00/12,704.88
  6. Step 6: Final answer
    x = 18,298.07

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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.