Home / 20,143.32-30,211.86-10,289.88

Finding the Fourth Proportional to 20,143.32, 30,211.86 and 10,289.88

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Solution

The fourth proportional to 20,143.32, 30,211.86 and 10,289.88 is: 15,433.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.32 : 30,211.86 = 10,289.88 : x
  2. Step 2: Convert to fraction form
    20,143.32/30,211.86 = 10,289.88/x
  3. Step 3: Cross multiply
    20,143.32x = 30,211.86 × 10,289.88
  4. Step 4: Simplify right side
    20,143.32x = 310,876,413.98
  5. Step 5: Solve for x
    x = 310,876,413.98/20,143.32
  6. Step 6: Final answer
    x = 15,433.23

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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.