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Finding the Fourth Proportional to 12,842, 17,721.96 and 6,954

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Solution

The fourth proportional to 12,842, 17,721.96 and 6,954 is: 9,596.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,842 : 17,721.96 = 6,954 : x
  2. Step 2: Convert to fraction form
    12,842/17,721.96 = 6,954/x
  3. Step 3: Cross multiply
    12,842x = 17,721.96 × 6,954
  4. Step 4: Simplify right side
    12,842x = 123,238,509.84
  5. Step 5: Solve for x
    x = 123,238,509.84/12,842
  6. Step 6: Final answer
    x = 9,596.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.