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Finding the Fourth Proportional to 18,978, 26,187.64 and 11,018.66

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Solution

The fourth proportional to 18,978, 26,187.64 and 11,018.66 is: 15,204.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978 : 26,187.64 = 11,018.66 : x
  2. Step 2: Convert to fraction form
    18,978/26,187.64 = 11,018.66/x
  3. Step 3: Cross multiply
    18,978x = 26,187.64 × 11,018.66
  4. Step 4: Simplify right side
    18,978x = 288,552,701.36
  5. Step 5: Solve for x
    x = 288,552,701.36/18,978
  6. Step 6: Final answer
    x = 15,204.59

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