Home / 20,406.49-30,606.21-5,413.72

Finding the Fourth Proportional to 20,406.49, 30,606.21 and 5,413.72

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Solution

The fourth proportional to 20,406.49, 30,606.21 and 5,413.72 is: 8,119.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.49 : 30,606.21 = 5,413.72 : x
  2. Step 2: Convert to fraction form
    20,406.49/30,606.21 = 5,413.72/x
  3. Step 3: Cross multiply
    20,406.49x = 30,606.21 × 5,413.72
  4. Step 4: Simplify right side
    20,406.49x = 165,693,451.20
  5. Step 5: Solve for x
    x = 165,693,451.20/20,406.49
  6. Step 6: Final answer
    x = 8,119.64

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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.