Home / 7,821.28-11,736.06-4,540.78

Finding the Fourth Proportional to 7,821.28, 11,736.06 and 4,540.78

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Solution

The fourth proportional to 7,821.28, 11,736.06 and 4,540.78 is: 6,813.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.28 : 11,736.06 = 4,540.78 : x
  2. Step 2: Convert to fraction form
    7,821.28/11,736.06 = 4,540.78/x
  3. Step 3: Cross multiply
    7,821.28x = 11,736.06 × 4,540.78
  4. Step 4: Simplify right side
    7,821.28x = 53,290,866.53
  5. Step 5: Solve for x
    x = 53,290,866.53/7,821.28
  6. Step 6: Final answer
    x = 6,813.57

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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.