Home / 20,939.51-31,413.10-6,900.36

Finding the Fourth Proportional to 20,939.51, 31,413.10 and 6,900.36

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Solution

The fourth proportional to 20,939.51, 31,413.10 and 6,900.36 is: 10,351.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.51 : 31,413.10 = 6,900.36 : x
  2. Step 2: Convert to fraction form
    20,939.51/31,413.10 = 6,900.36/x
  3. Step 3: Cross multiply
    20,939.51x = 31,413.10 × 6,900.36
  4. Step 4: Simplify right side
    20,939.51x = 216,761,698.72
  5. Step 5: Solve for x
    x = 216,761,698.72/20,939.51
  6. Step 6: Final answer
    x = 10,351.81

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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.