Home / 31,413.79-47,136.63-20,891.13

Finding the Fourth Proportional to 31,413.79, 47,136.63 and 20,891.13

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Solution

The fourth proportional to 31,413.79, 47,136.63 and 20,891.13 is: 31,347.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,413.79 : 47,136.63 = 20,891.13 : x
  2. Step 2: Convert to fraction form
    31,413.79/47,136.63 = 20,891.13/x
  3. Step 3: Cross multiply
    31,413.79x = 47,136.63 × 20,891.13
  4. Step 4: Simplify right side
    31,413.79x = 984,737,465.09
  5. Step 5: Solve for x
    x = 984,737,465.09/31,413.79
  6. Step 6: Final answer
    x = 31,347.30

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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.