Home / 21,218.05-31,828.08-6,987.43

Finding the Fourth Proportional to 21,218.05, 31,828.08 and 6,987.43

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Solution

The fourth proportional to 21,218.05, 31,828.08 and 6,987.43 is: 10,481.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.05 : 31,828.08 = 6,987.43 : x
  2. Step 2: Convert to fraction form
    21,218.05/31,828.08 = 6,987.43/x
  3. Step 3: Cross multiply
    21,218.05x = 31,828.08 × 6,987.43
  4. Step 4: Simplify right side
    21,218.05x = 222,396,481.03
  5. Step 5: Solve for x
    x = 222,396,481.03/21,218.05
  6. Step 6: Final answer
    x = 10,481.48

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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.