Home / 20,800.19-31,171.13-10,919.51

Finding the Fourth Proportional to 20,800.19, 31,171.13 and 10,919.51

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Solution

The fourth proportional to 20,800.19, 31,171.13 and 10,919.51 is: 16,363.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.19 : 31,171.13 = 10,919.51 : x
  2. Step 2: Convert to fraction form
    20,800.19/31,171.13 = 10,919.51/x
  3. Step 3: Cross multiply
    20,800.19x = 31,171.13 × 10,919.51
  4. Step 4: Simplify right side
    20,800.19x = 340,373,413.13
  5. Step 5: Solve for x
    x = 340,373,413.13/20,800.19
  6. Step 6: Final answer
    x = 16,363.95

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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.