Home / 5,413.86-8,117.88-2,780.28

Finding the Fourth Proportional to 5,413.86, 8,117.88 and 2,780.28

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Solution

The fourth proportional to 5,413.86, 8,117.88 and 2,780.28 is: 4,168.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,413.86 : 8,117.88 = 2,780.28 : x
  2. Step 2: Convert to fraction form
    5,413.86/8,117.88 = 2,780.28/x
  3. Step 3: Cross multiply
    5,413.86x = 8,117.88 × 2,780.28
  4. Step 4: Simplify right side
    5,413.86x = 22,569,979.41
  5. Step 5: Solve for x
    x = 22,569,979.41/5,413.86
  6. Step 6: Final answer
    x = 4,168.93

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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.