Home / 7,815.56-11,718.44-3,653.78

Finding the Fourth Proportional to 7,815.56, 11,718.44 and 3,653.78

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Solution

The fourth proportional to 7,815.56, 11,718.44 and 3,653.78 is: 5,478.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.56 : 11,718.44 = 3,653.78 : x
  2. Step 2: Convert to fraction form
    7,815.56/11,718.44 = 3,653.78/x
  3. Step 3: Cross multiply
    7,815.56x = 11,718.44 × 3,653.78
  4. Step 4: Simplify right side
    7,815.56x = 42,816,601.70
  5. Step 5: Solve for x
    x = 42,816,601.70/7,815.56
  6. Step 6: Final answer
    x = 5,478.38

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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.