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Finding the Fourth Proportional to 19,161, 28,729.62 and 8,061.96

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Solution

The fourth proportional to 19,161, 28,729.62 and 8,061.96 is: 12,087.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,161 : 28,729.62 = 8,061.96 : x
  2. Step 2: Convert to fraction form
    19,161/28,729.62 = 8,061.96/x
  3. Step 3: Cross multiply
    19,161x = 28,729.62 × 8,061.96
  4. Step 4: Simplify right side
    19,161x = 231,617,047.26
  5. Step 5: Solve for x
    x = 231,617,047.26/19,161
  6. Step 6: Final answer
    x = 12,087.94

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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.