Home / 21,007.98-28,989.64-11,576.54

Finding the Fourth Proportional to 21,007.98, 28,989.64 and 11,576.54

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Solution

The fourth proportional to 21,007.98, 28,989.64 and 11,576.54 is: 15,974.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.98 : 28,989.64 = 11,576.54 : x
  2. Step 2: Convert to fraction form
    21,007.98/28,989.64 = 11,576.54/x
  3. Step 3: Cross multiply
    21,007.98x = 28,989.64 × 11,576.54
  4. Step 4: Simplify right side
    21,007.98x = 335,599,524.21
  5. Step 5: Solve for x
    x = 335,599,524.21/21,007.98
  6. Step 6: Final answer
    x = 15,974.86

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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.