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Finding the Fourth Proportional to 21,918.63, 32,876.11 and 8,771.73

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Solution

The fourth proportional to 21,918.63, 32,876.11 and 8,771.73 is: 13,156.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918.63 : 32,876.11 = 8,771.73 : x
  2. Step 2: Convert to fraction form
    21,918.63/32,876.11 = 8,771.73/x
  3. Step 3: Cross multiply
    21,918.63x = 32,876.11 × 8,771.73
  4. Step 4: Simplify right side
    21,918.63x = 288,380,248.05
  5. Step 5: Solve for x
    x = 288,380,248.05/21,918.63
  6. Step 6: Final answer
    x = 13,156.85

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1.5x scale

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.