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Finding the Fourth Proportional to 21,694, 32,541 and 5,278

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Solution

The fourth proportional to 21,694, 32,541 and 5,278 is: 7,917

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,694 : 32,541 = 5,278 : x
  2. Step 2: Convert to fraction form
    21,694/32,541 = 5,278/x
  3. Step 3: Cross multiply
    21,694x = 32,541 × 5,278
  4. Step 4: Simplify right side
    21,694x = 171,751,398
  5. Step 5: Solve for x
    x = 171,751,398/21,694
  6. Step 6: Final answer
    x = 7,917

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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.