Home / 7,315.28-10,974-2,120.48

Finding the Fourth Proportional to 7,315.28, 10,974 and 2,120.48

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Solution

The fourth proportional to 7,315.28, 10,974 and 2,120.48 is: 3,181.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,315.28 : 10,974 = 2,120.48 : x
  2. Step 2: Convert to fraction form
    7,315.28/10,974 = 2,120.48/x
  3. Step 3: Cross multiply
    7,315.28x = 10,974 × 2,120.48
  4. Step 4: Simplify right side
    7,315.28x = 23,270,147.52
  5. Step 5: Solve for x
    x = 23,270,147.52/7,315.28
  6. Step 6: Final answer
    x = 3,181.03

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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.