Home / 20,939.47-31,413.05-6,900.33

Finding the Fourth Proportional to 20,939.47, 31,413.05 and 6,900.33

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Solution

The fourth proportional to 20,939.47, 31,413.05 and 6,900.33 is: 10,351.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.47 : 31,413.05 = 6,900.33 : x
  2. Step 2: Convert to fraction form
    20,939.47/31,413.05 = 6,900.33/x
  3. Step 3: Cross multiply
    20,939.47x = 31,413.05 × 6,900.33
  4. Step 4: Simplify right side
    20,939.47x = 216,760,323.70
  5. Step 5: Solve for x
    x = 216,760,323.70/20,939.47
  6. Step 6: Final answer
    x = 10,351.76

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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.