Home / 7,280.80-10,918.32-2,661.28

Finding the Fourth Proportional to 7,280.80, 10,918.32 and 2,661.28

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Solution

The fourth proportional to 7,280.80, 10,918.32 and 2,661.28 is: 3,990.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,280.80 : 10,918.32 = 2,661.28 : x
  2. Step 2: Convert to fraction form
    7,280.80/10,918.32 = 2,661.28/x
  3. Step 3: Cross multiply
    7,280.80x = 10,918.32 × 2,661.28
  4. Step 4: Simplify right side
    7,280.80x = 29,056,706.65
  5. Step 5: Solve for x
    x = 29,056,706.65/7,280.80
  6. Step 6: Final answer
    x = 3,990.87

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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.