Home / 8,515.20-12,771.87-2,275.77

Finding the Fourth Proportional to 8,515.20, 12,771.87 and 2,275.77

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Solution

The fourth proportional to 8,515.20, 12,771.87 and 2,275.77 is: 3,413.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.20 : 12,771.87 = 2,275.77 : x
  2. Step 2: Convert to fraction form
    8,515.20/12,771.87 = 2,275.77/x
  3. Step 3: Cross multiply
    8,515.20x = 12,771.87 × 2,275.77
  4. Step 4: Simplify right side
    8,515.20x = 29,065,838.59
  5. Step 5: Solve for x
    x = 29,065,838.59/8,515.20
  6. Step 6: Final answer
    x = 3,413.41

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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.