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Finding the Fourth Proportional to 21,881.72, 32,828.88 and 10,791.80

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Solution

The fourth proportional to 21,881.72, 32,828.88 and 10,791.80 is: 16,190.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,881.72 : 32,828.88 = 10,791.80 : x
  2. Step 2: Convert to fraction form
    21,881.72/32,828.88 = 10,791.80/x
  3. Step 3: Cross multiply
    21,881.72x = 32,828.88 × 10,791.80
  4. Step 4: Simplify right side
    21,881.72x = 354,282,707.18
  5. Step 5: Solve for x
    x = 354,282,707.18/21,881.72
  6. Step 6: Final answer
    x = 16,190.81

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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.