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Finding the Fourth Proportional to 27,169.61, 40,745.99 and 13,120.90

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Solution

The fourth proportional to 27,169.61, 40,745.99 and 13,120.90 is: 19,677.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,169.61 : 40,745.99 = 13,120.90 : x
  2. Step 2: Convert to fraction form
    27,169.61/40,745.99 = 13,120.90/x
  3. Step 3: Cross multiply
    27,169.61x = 40,745.99 × 13,120.90
  4. Step 4: Simplify right side
    27,169.61x = 534,623,991.13
  5. Step 5: Solve for x
    x = 534,623,991.13/27,169.61
  6. Step 6: Final answer
    x = 19,677.28

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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.