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Finding the Fourth Proportional to 27,289.50, 40,947.21 and 8,821.50

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Solution

The fourth proportional to 27,289.50, 40,947.21 and 8,821.50 is: 13,236.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,289.50 : 40,947.21 = 8,821.50 : x
  2. Step 2: Convert to fraction form
    27,289.50/40,947.21 = 8,821.50/x
  3. Step 3: Cross multiply
    27,289.50x = 40,947.21 × 8,821.50
  4. Step 4: Simplify right side
    27,289.50x = 361,215,813.02
  5. Step 5: Solve for x
    x = 361,215,813.02/27,289.50
  6. Step 6: Final answer
    x = 13,236.44

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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.