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Finding the Fourth Proportional to 21,078.48, 29,087.91 and 11,646.84

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Solution

The fourth proportional to 21,078.48, 29,087.91 and 11,646.84 is: 16,072.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.48 : 29,087.91 = 11,646.84 : x
  2. Step 2: Convert to fraction form
    21,078.48/29,087.91 = 11,646.84/x
  3. Step 3: Cross multiply
    21,078.48x = 29,087.91 × 11,646.84
  4. Step 4: Simplify right side
    21,078.48x = 338,782,233.70
  5. Step 5: Solve for x
    x = 338,782,233.70/21,078.48
  6. Step 6: Final answer
    x = 16,072.42

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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.