Home / 21,078.14-29,088.42-11,647.31

Finding the Fourth Proportional to 21,078.14, 29,088.42 and 11,647.31

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Solution

The fourth proportional to 21,078.14, 29,088.42 and 11,647.31 is: 16,073.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.14 : 29,088.42 = 11,647.31 : x
  2. Step 2: Convert to fraction form
    21,078.14/29,088.42 = 11,647.31/x
  3. Step 3: Cross multiply
    21,078.14x = 29,088.42 × 11,647.31
  4. Step 4: Simplify right side
    21,078.14x = 338,801,845.15
  5. Step 5: Solve for x
    x = 338,801,845.15/21,078.14
  6. Step 6: Final answer
    x = 16,073.61

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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.