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Finding the Fourth Proportional to 21,945, 32,917.50 and 5,529

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Solution

The fourth proportional to 21,945, 32,917.50 and 5,529 is: 8,293.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,945 : 32,917.50 = 5,529 : x
  2. Step 2: Convert to fraction form
    21,945/32,917.50 = 5,529/x
  3. Step 3: Cross multiply
    21,945x = 32,917.50 × 5,529
  4. Step 4: Simplify right side
    21,945x = 182,000,857.50
  5. Step 5: Solve for x
    x = 182,000,857.50/21,945
  6. Step 6: Final answer
    x = 8,293.50

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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.