Home / 8,619.40-12,930.32-2,775.25

Finding the Fourth Proportional to 8,619.40, 12,930.32 and 2,775.25

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Solution

The fourth proportional to 8,619.40, 12,930.32 and 2,775.25 is: 4,163.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.40 : 12,930.32 = 2,775.25 : x
  2. Step 2: Convert to fraction form
    8,619.40/12,930.32 = 2,775.25/x
  3. Step 3: Cross multiply
    8,619.40x = 12,930.32 × 2,775.25
  4. Step 4: Simplify right side
    8,619.40x = 35,884,870.58
  5. Step 5: Solve for x
    x = 35,884,870.58/8,619.40
  6. Step 6: Final answer
    x = 4,163.27

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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.