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Finding the Fourth Proportional to 18,166.98, 27,238.77 and 7,643.82

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Solution

The fourth proportional to 18,166.98, 27,238.77 and 7,643.82 is: 11,460.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,166.98 : 27,238.77 = 7,643.82 : x
  2. Step 2: Convert to fraction form
    18,166.98/27,238.77 = 7,643.82/x
  3. Step 3: Cross multiply
    18,166.98x = 27,238.77 × 7,643.82
  4. Step 4: Simplify right side
    18,166.98x = 208,208,254.90
  5. Step 5: Solve for x
    x = 208,208,254.90/18,166.98
  6. Step 6: Final answer
    x = 11,460.81

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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.