Home / 5,280.36-7,920.76-1,993.38

Finding the Fourth Proportional to 5,280.36, 7,920.76 and 1,993.38

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Solution

The fourth proportional to 5,280.36, 7,920.76 and 1,993.38 is: 2,990.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.36 : 7,920.76 = 1,993.38 : x
  2. Step 2: Convert to fraction form
    5,280.36/7,920.76 = 1,993.38/x
  3. Step 3: Cross multiply
    5,280.36x = 7,920.76 × 1,993.38
  4. Step 4: Simplify right side
    5,280.36x = 15,789,084.57
  5. Step 5: Solve for x
    x = 15,789,084.57/5,280.36
  6. Step 6: Final answer
    x = 2,990.15

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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.