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Finding the Fourth Proportional to 10,992.56, 16,487.01 and 3,971.21

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Solution

The fourth proportional to 10,992.56, 16,487.01 and 3,971.21 is: 5,956.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,992.56 : 16,487.01 = 3,971.21 : x
  2. Step 2: Convert to fraction form
    10,992.56/16,487.01 = 3,971.21/x
  3. Step 3: Cross multiply
    10,992.56x = 16,487.01 × 3,971.21
  4. Step 4: Simplify right side
    10,992.56x = 65,473,378.98
  5. Step 5: Solve for x
    x = 65,473,378.98/10,992.56
  6. Step 6: Final answer
    x = 5,956.15

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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.