Home / 21,261.74-31,871.79-7,924.97

Finding the Fourth Proportional to 21,261.74, 31,871.79 and 7,924.97

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Solution

The fourth proportional to 21,261.74, 31,871.79 and 7,924.97 is: 11,879.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,261.74 : 31,871.79 = 7,924.97 : x
  2. Step 2: Convert to fraction form
    21,261.74/31,871.79 = 7,924.97/x
  3. Step 3: Cross multiply
    21,261.74x = 31,871.79 × 7,924.97
  4. Step 4: Simplify right side
    21,261.74x = 252,582,979.60
  5. Step 5: Solve for x
    x = 252,582,979.60/21,261.74
  6. Step 6: Final answer
    x = 11,879.69

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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.