Home / 7,815.65-11,723.87-1,972.31

Finding the Fourth Proportional to 7,815.65, 11,723.87 and 1,972.31

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Solution

The fourth proportional to 7,815.65, 11,723.87 and 1,972.31 is: 2,958.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.65 : 11,723.87 = 1,972.31 : x
  2. Step 2: Convert to fraction form
    7,815.65/11,723.87 = 1,972.31/x
  3. Step 3: Cross multiply
    7,815.65x = 11,723.87 × 1,972.31
  4. Step 4: Simplify right side
    7,815.65x = 23,123,052.35
  5. Step 5: Solve for x
    x = 23,123,052.35/7,815.65
  6. Step 6: Final answer
    x = 2,958.56

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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.