Home / 31,413.80-47,136.64-20,891.14

Finding the Fourth Proportional to 31,413.80, 47,136.64 and 20,891.14

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Solution

The fourth proportional to 31,413.80, 47,136.64 and 20,891.14 is: 31,347.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,413.80 : 47,136.64 = 20,891.14 : x
  2. Step 2: Convert to fraction form
    31,413.80/47,136.64 = 20,891.14/x
  3. Step 3: Cross multiply
    31,413.80x = 47,136.64 × 20,891.14
  4. Step 4: Simplify right side
    31,413.80x = 984,738,145.37
  5. Step 5: Solve for x
    x = 984,738,145.37/31,413.80
  6. Step 6: Final answer
    x = 31,347.31

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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.