Home / 21,007.75-28,991.31-11,576.92

Finding the Fourth Proportional to 21,007.75, 28,991.31 and 11,576.92

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Solution

The fourth proportional to 21,007.75, 28,991.31 and 11,576.92 is: 15,976.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.75 : 28,991.31 = 11,576.92 : x
  2. Step 2: Convert to fraction form
    21,007.75/28,991.31 = 11,576.92/x
  3. Step 3: Cross multiply
    21,007.75x = 28,991.31 × 11,576.92
  4. Step 4: Simplify right side
    21,007.75x = 335,630,076.57
  5. Step 5: Solve for x
    x = 335,630,076.57/21,007.75
  6. Step 6: Final answer
    x = 15,976.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.