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Finding the Fourth Proportional to 22,413.65, 30,923.98 and 12,980.39

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Solution

The fourth proportional to 22,413.65, 30,923.98 and 12,980.39 is: 17,908.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,413.65 : 30,923.98 = 12,980.39 : x
  2. Step 2: Convert to fraction form
    22,413.65/30,923.98 = 12,980.39/x
  3. Step 3: Cross multiply
    22,413.65x = 30,923.98 × 12,980.39
  4. Step 4: Simplify right side
    22,413.65x = 401,405,133.68
  5. Step 5: Solve for x
    x = 401,405,133.68/22,413.65
  6. Step 6: Final answer
    x = 17,908.96

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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.