Home / 7,815.65-11,724.70-2,620.31

Finding the Fourth Proportional to 7,815.65, 11,724.70 and 2,620.31

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Solution

The fourth proportional to 7,815.65, 11,724.70 and 2,620.31 is: 3,930.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.65 : 11,724.70 = 2,620.31 : x
  2. Step 2: Convert to fraction form
    7,815.65/11,724.70 = 2,620.31/x
  3. Step 3: Cross multiply
    7,815.65x = 11,724.70 × 2,620.31
  4. Step 4: Simplify right side
    7,815.65x = 30,722,371.42
  5. Step 5: Solve for x
    x = 30,722,371.42/7,815.65
  6. Step 6: Final answer
    x = 3,930.88

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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.