Home / 31,413.29-47,135.88-20,890.63

Finding the Fourth Proportional to 31,413.29, 47,135.88 and 20,890.63

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Solution

The fourth proportional to 31,413.29, 47,135.88 and 20,890.63 is: 31,346.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,413.29 : 47,135.88 = 20,890.63 : x
  2. Step 2: Convert to fraction form
    31,413.29/47,135.88 = 20,890.63/x
  3. Step 3: Cross multiply
    31,413.29x = 47,135.88 × 20,890.63
  4. Step 4: Simplify right side
    31,413.29x = 984,698,228.80
  5. Step 5: Solve for x
    x = 984,698,228.80/31,413.29
  6. Step 6: Final answer
    x = 31,346.55

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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.