Home / 8,619.54-12,928.74-2,775.66

Finding the Fourth Proportional to 8,619.54, 12,928.74 and 2,775.66

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Solution

The fourth proportional to 8,619.54, 12,928.74 and 2,775.66 is: 4,163.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.54 : 12,928.74 = 2,775.66 : x
  2. Step 2: Convert to fraction form
    8,619.54/12,928.74 = 2,775.66/x
  3. Step 3: Cross multiply
    8,619.54x = 12,928.74 × 2,775.66
  4. Step 4: Simplify right side
    8,619.54x = 35,885,786.47
  5. Step 5: Solve for x
    x = 35,885,786.47/8,619.54
  6. Step 6: Final answer
    x = 4,163.31

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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.