Home / 31,428.92-47,138.52-20,413.73

Finding the Fourth Proportional to 31,428.92, 47,138.52 and 20,413.73

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Solution

The fourth proportional to 31,428.92, 47,138.52 and 20,413.73 is: 30,617.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,428.92 : 47,138.52 = 20,413.73 : x
  2. Step 2: Convert to fraction form
    31,428.92/47,138.52 = 20,413.73/x
  3. Step 3: Cross multiply
    31,428.92x = 47,138.52 × 20,413.73
  4. Step 4: Simplify right side
    31,428.92x = 962,273,019.88
  5. Step 5: Solve for x
    x = 962,273,019.88/31,428.92
  6. Step 6: Final answer
    x = 30,617.44

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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.