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Finding the Fourth Proportional to 11,978.03, 17,945.15 and 8,682.95

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Solution

The fourth proportional to 11,978.03, 17,945.15 and 8,682.95 is: 13,008.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,978.03 : 17,945.15 = 8,682.95 : x
  2. Step 2: Convert to fraction form
    11,978.03/17,945.15 = 8,682.95/x
  3. Step 3: Cross multiply
    11,978.03x = 17,945.15 × 8,682.95
  4. Step 4: Simplify right side
    11,978.03x = 155,816,707.05
  5. Step 5: Solve for x
    x = 155,816,707.05/11,978.03
  6. Step 6: Final answer
    x = 13,008.55

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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.