Home / 20,942.52-31,413.76-5,360.12

Finding the Fourth Proportional to 20,942.52, 31,413.76 and 5,360.12

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Solution

The fourth proportional to 20,942.52, 31,413.76 and 5,360.12 is: 8,040.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.52 : 31,413.76 = 5,360.12 : x
  2. Step 2: Convert to fraction form
    20,942.52/31,413.76 = 5,360.12/x
  3. Step 3: Cross multiply
    20,942.52x = 31,413.76 × 5,360.12
  4. Step 4: Simplify right side
    20,942.52x = 168,381,523.25
  5. Step 5: Solve for x
    x = 168,381,523.25/20,942.52
  6. Step 6: Final answer
    x = 8,040.17

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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.