Home / 28,531.89-42,839.37-20,255.85

Finding the Fourth Proportional to 28,531.89, 42,839.37 and 20,255.85

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Solution

The fourth proportional to 28,531.89, 42,839.37 and 20,255.85 is: 30,413.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,531.89 : 42,839.37 = 20,255.85 : x
  2. Step 2: Convert to fraction form
    28,531.89/42,839.37 = 20,255.85/x
  3. Step 3: Cross multiply
    28,531.89x = 42,839.37 × 20,255.85
  4. Step 4: Simplify right side
    28,531.89x = 867,747,852.81
  5. Step 5: Solve for x
    x = 867,747,852.81/28,531.89
  6. Step 6: Final answer
    x = 30,413.26

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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.