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Finding the Fourth Proportional to 9,421.92, 12,991.32 and 8,849.79

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Solution

The fourth proportional to 9,421.92, 12,991.32 and 8,849.79 is: 12,202.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,421.92 : 12,991.32 = 8,849.79 : x
  2. Step 2: Convert to fraction form
    9,421.92/12,991.32 = 8,849.79/x
  3. Step 3: Cross multiply
    9,421.92x = 12,991.32 × 8,849.79
  4. Step 4: Simplify right side
    9,421.92x = 114,970,453.82
  5. Step 5: Solve for x
    x = 114,970,453.82/9,421.92
  6. Step 6: Final answer
    x = 12,202.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.