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Finding the Fourth Proportional to 21,571.62, 32,313.69 and 11,161.50

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Solution

The fourth proportional to 21,571.62, 32,313.69 and 11,161.50 is: 16,719.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,571.62 : 32,313.69 = 11,161.50 : x
  2. Step 2: Convert to fraction form
    21,571.62/32,313.69 = 11,161.50/x
  3. Step 3: Cross multiply
    21,571.62x = 32,313.69 × 11,161.50
  4. Step 4: Simplify right side
    21,571.62x = 360,669,250.94
  5. Step 5: Solve for x
    x = 360,669,250.94/21,571.62
  6. Step 6: Final answer
    x = 16,719.62

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.