Home / 8,619.92-12,928.56-2,775.92

Finding the Fourth Proportional to 8,619.92, 12,928.56 and 2,775.92

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Solution

The fourth proportional to 8,619.92, 12,928.56 and 2,775.92 is: 4,163.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.92 : 12,928.56 = 2,775.92 : x
  2. Step 2: Convert to fraction form
    8,619.92/12,928.56 = 2,775.92/x
  3. Step 3: Cross multiply
    8,619.92x = 12,928.56 × 2,775.92
  4. Step 4: Simplify right side
    8,619.92x = 35,888,648.28
  5. Step 5: Solve for x
    x = 35,888,648.28/8,619.92
  6. Step 6: Final answer
    x = 4,163.45

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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.