Home / 8,270.19-12,399.35-2,720.43

Finding the Fourth Proportional to 8,270.19, 12,399.35 and 2,720.43

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Solution

The fourth proportional to 8,270.19, 12,399.35 and 2,720.43 is: 4,078.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,270.19 : 12,399.35 = 2,720.43 : x
  2. Step 2: Convert to fraction form
    8,270.19/12,399.35 = 2,720.43/x
  3. Step 3: Cross multiply
    8,270.19x = 12,399.35 × 2,720.43
  4. Step 4: Simplify right side
    8,270.19x = 33,731,550.12
  5. Step 5: Solve for x
    x = 33,731,550.12/8,270.19
  6. Step 6: Final answer
    x = 4,078.69

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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.