Home / 21,076.24-31,619.66-9,979.94

Finding the Fourth Proportional to 21,076.24, 31,619.66 and 9,979.94

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Solution

The fourth proportional to 21,076.24, 31,619.66 and 9,979.94 is: 14,972.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,076.24 : 31,619.66 = 9,979.94 : x
  2. Step 2: Convert to fraction form
    21,076.24/31,619.66 = 9,979.94/x
  3. Step 3: Cross multiply
    21,076.24x = 31,619.66 × 9,979.94
  4. Step 4: Simplify right side
    21,076.24x = 315,562,309.62
  5. Step 5: Solve for x
    x = 315,562,309.62/21,076.24
  6. Step 6: Final answer
    x = 14,972.42

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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.