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Finding the Fourth Proportional to 21,991.30, 32,986.98 and 5,351.23

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Solution

The fourth proportional to 21,991.30, 32,986.98 and 5,351.23 is: 8,026.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.30 : 32,986.98 = 5,351.23 : x
  2. Step 2: Convert to fraction form
    21,991.30/32,986.98 = 5,351.23/x
  3. Step 3: Cross multiply
    21,991.30x = 32,986.98 × 5,351.23
  4. Step 4: Simplify right side
    21,991.30x = 176,520,958.22
  5. Step 5: Solve for x
    x = 176,520,958.22/21,991.30
  6. Step 6: Final answer
    x = 8,026.86

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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.