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Finding the Fourth Proportional to 27,991.50, 38,626.84 and 15,413.82

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Solution

The fourth proportional to 27,991.50, 38,626.84 and 15,413.82 is: 21,270.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,991.50 : 38,626.84 = 15,413.82 : x
  2. Step 2: Convert to fraction form
    27,991.50/38,626.84 = 15,413.82/x
  3. Step 3: Cross multiply
    27,991.50x = 38,626.84 × 15,413.82
  4. Step 4: Simplify right side
    27,991.50x = 595,387,158.93
  5. Step 5: Solve for x
    x = 595,387,158.93/27,991.50
  6. Step 6: Final answer
    x = 21,270.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.