Home / 5,109.12-7,661.79-1,821.33

Finding the Fourth Proportional to 5,109.12, 7,661.79 and 1,821.33

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Solution

The fourth proportional to 5,109.12, 7,661.79 and 1,821.33 is: 2,731.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.12 : 7,661.79 = 1,821.33 : x
  2. Step 2: Convert to fraction form
    5,109.12/7,661.79 = 1,821.33/x
  3. Step 3: Cross multiply
    5,109.12x = 7,661.79 × 1,821.33
  4. Step 4: Simplify right side
    5,109.12x = 13,954,647.98
  5. Step 5: Solve for x
    x = 13,954,647.98/5,109.12
  6. Step 6: Final answer
    x = 2,731.32

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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.