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Finding the Fourth Proportional to 21,793.74, 32,687.37 and 7,939.50

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Solution

The fourth proportional to 21,793.74, 32,687.37 and 7,939.50 is: 11,908.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,793.74 : 32,687.37 = 7,939.50 : x
  2. Step 2: Convert to fraction form
    21,793.74/32,687.37 = 7,939.50/x
  3. Step 3: Cross multiply
    21,793.74x = 32,687.37 × 7,939.50
  4. Step 4: Simplify right side
    21,793.74x = 259,521,374.12
  5. Step 5: Solve for x
    x = 259,521,374.12/21,793.74
  6. Step 6: Final answer
    x = 11,908.07

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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.