Home / 20,745.11-31,117.68-5,162.74

Finding the Fourth Proportional to 20,745.11, 31,117.68 and 5,162.74

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Solution

The fourth proportional to 20,745.11, 31,117.68 and 5,162.74 is: 7,744.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.11 : 31,117.68 = 5,162.74 : x
  2. Step 2: Convert to fraction form
    20,745.11/31,117.68 = 5,162.74/x
  3. Step 3: Cross multiply
    20,745.11x = 31,117.68 × 5,162.74
  4. Step 4: Simplify right side
    20,745.11x = 160,652,413.45
  5. Step 5: Solve for x
    x = 160,652,413.45/20,745.11
  6. Step 6: Final answer
    x = 7,744.11

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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.