Home / 5,413.98-8,121.15-2,780.76

Finding the Fourth Proportional to 5,413.98, 8,121.15 and 2,780.76

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Solution

The fourth proportional to 5,413.98, 8,121.15 and 2,780.76 is: 4,171.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,413.98 : 8,121.15 = 2,780.76 : x
  2. Step 2: Convert to fraction form
    5,413.98/8,121.15 = 2,780.76/x
  3. Step 3: Cross multiply
    5,413.98x = 8,121.15 × 2,780.76
  4. Step 4: Simplify right side
    5,413.98x = 22,582,955.17
  5. Step 5: Solve for x
    x = 22,582,955.17/5,413.98
  6. Step 6: Final answer
    x = 4,171.23

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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.