Home / 20,972.78-31,464.62-7,825.25

Finding the Fourth Proportional to 20,972.78, 31,464.62 and 7,825.25

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Solution

The fourth proportional to 20,972.78, 31,464.62 and 7,825.25 is: 11,739.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.78 : 31,464.62 = 7,825.25 : x
  2. Step 2: Convert to fraction form
    20,972.78/31,464.62 = 7,825.25/x
  3. Step 3: Cross multiply
    20,972.78x = 31,464.62 × 7,825.25
  4. Step 4: Simplify right side
    20,972.78x = 246,218,478.53
  5. Step 5: Solve for x
    x = 246,218,478.53/20,972.78
  6. Step 6: Final answer
    x = 11,739.91

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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.