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Finding the Fourth Proportional to 21,376.71, 32,047.77 and 8,906.09

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Solution

The fourth proportional to 21,376.71, 32,047.77 and 8,906.09 is: 13,351.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,376.71 : 32,047.77 = 8,906.09 : x
  2. Step 2: Convert to fraction form
    21,376.71/32,047.77 = 8,906.09/x
  3. Step 3: Cross multiply
    21,376.71x = 32,047.77 × 8,906.09
  4. Step 4: Simplify right side
    21,376.71x = 285,420,163.68
  5. Step 5: Solve for x
    x = 285,420,163.68/21,376.71
  6. Step 6: Final answer
    x = 13,351.92

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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.