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Finding the Fourth Proportional to 21,847.40, 32,771.08 and 8,699.88

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Solution

The fourth proportional to 21,847.40, 32,771.08 and 8,699.88 is: 13,049.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,847.40 : 32,771.08 = 8,699.88 : x
  2. Step 2: Convert to fraction form
    21,847.40/32,771.08 = 8,699.88/x
  3. Step 3: Cross multiply
    21,847.40x = 32,771.08 × 8,699.88
  4. Step 4: Simplify right side
    21,847.40x = 285,104,463.47
  5. Step 5: Solve for x
    x = 285,104,463.47/21,847.40
  6. Step 6: Final answer
    x = 13,049.81

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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.