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Finding the Fourth Proportional to 12,687.89, 19,020.90 and 6,105.02

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Solution

The fourth proportional to 12,687.89, 19,020.90 and 6,105.02 is: 9,152.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,687.89 : 19,020.90 = 6,105.02 : x
  2. Step 2: Convert to fraction form
    12,687.89/19,020.90 = 6,105.02/x
  3. Step 3: Cross multiply
    12,687.89x = 19,020.90 × 6,105.02
  4. Step 4: Simplify right side
    12,687.89x = 116,122,896.84
  5. Step 5: Solve for x
    x = 116,122,896.84/12,687.89
  6. Step 6: Final answer
    x = 9,152.26

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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.