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Finding the Fourth Proportional to 9,939.80, 13,718.22 and 6,413.27

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Solution

The fourth proportional to 9,939.80, 13,718.22 and 6,413.27 is: 8,851.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,939.80 : 13,718.22 = 6,413.27 : x
  2. Step 2: Convert to fraction form
    9,939.80/13,718.22 = 6,413.27/x
  3. Step 3: Cross multiply
    9,939.80x = 13,718.22 × 6,413.27
  4. Step 4: Simplify right side
    9,939.80x = 87,978,648.78
  5. Step 5: Solve for x
    x = 87,978,648.78/9,939.80
  6. Step 6: Final answer
    x = 8,851.15

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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.