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Finding the Fourth Proportional to 7,243.80, 10,862.94 and 3,081.21

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Solution

The fourth proportional to 7,243.80, 10,862.94 and 3,081.21 is: 4,620.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,243.80 : 10,862.94 = 3,081.21 : x
  2. Step 2: Convert to fraction form
    7,243.80/10,862.94 = 3,081.21/x
  3. Step 3: Cross multiply
    7,243.80x = 10,862.94 × 3,081.21
  4. Step 4: Simplify right side
    7,243.80x = 33,470,999.36
  5. Step 5: Solve for x
    x = 33,470,999.36/7,243.80
  6. Step 6: Final answer
    x = 4,620.64

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1.5x scale

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.