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Finding the Fourth Proportional to 21,716.55, 32,554.04 and 6,917.31

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Solution

The fourth proportional to 21,716.55, 32,554.04 and 6,917.31 is: 10,369.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,716.55 : 32,554.04 = 6,917.31 : x
  2. Step 2: Convert to fraction form
    21,716.55/32,554.04 = 6,917.31/x
  3. Step 3: Cross multiply
    21,716.55x = 32,554.04 × 6,917.31
  4. Step 4: Simplify right side
    21,716.55x = 225,186,351.85
  5. Step 5: Solve for x
    x = 225,186,351.85/21,716.55
  6. Step 6: Final answer
    x = 10,369.34

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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.