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Finding the Fourth Proportional to 9,889.88, 13,647.38 and 5,413.68

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Solution

The fourth proportional to 9,889.88, 13,647.38 and 5,413.68 is: 7,470.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,889.88 : 13,647.38 = 5,413.68 : x
  2. Step 2: Convert to fraction form
    9,889.88/13,647.38 = 5,413.68/x
  3. Step 3: Cross multiply
    9,889.88x = 13,647.38 × 5,413.68
  4. Step 4: Simplify right side
    9,889.88x = 73,882,521.09
  5. Step 5: Solve for x
    x = 73,882,521.09/9,889.88
  6. Step 6: Final answer
    x = 7,470.52

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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.