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Finding the Fourth Proportional to 21,881.94, 32,805.99 and 11,340.42

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Solution

The fourth proportional to 21,881.94, 32,805.99 and 11,340.42 is: 17,001.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,881.94 : 32,805.99 = 11,340.42 : x
  2. Step 2: Convert to fraction form
    21,881.94/32,805.99 = 11,340.42/x
  3. Step 3: Cross multiply
    21,881.94x = 32,805.99 × 11,340.42
  4. Step 4: Simplify right side
    21,881.94x = 372,033,705.12
  5. Step 5: Solve for x
    x = 372,033,705.12/21,881.94
  6. Step 6: Final answer
    x = 17,001.86

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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.