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Finding the Fourth Proportional to 13,969.62, 20,929.77 and 13,625.19

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Solution

The fourth proportional to 13,969.62, 20,929.77 and 13,625.19 is: 20,413.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,969.62 : 20,929.77 = 13,625.19 : x
  2. Step 2: Convert to fraction form
    13,969.62/20,929.77 = 13,625.19/x
  3. Step 3: Cross multiply
    13,969.62x = 20,929.77 × 13,625.19
  4. Step 4: Simplify right side
    13,969.62x = 285,172,092.91
  5. Step 5: Solve for x
    x = 285,172,092.91/13,969.62
  6. Step 6: Final answer
    x = 20,413.73

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1.5x scale

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.