Home / 21,100.14-29,118.78-11,669.31

Finding the Fourth Proportional to 21,100.14, 29,118.78 and 11,669.31

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Solution

The fourth proportional to 21,100.14, 29,118.78 and 11,669.31 is: 16,103.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,100.14 : 29,118.78 = 11,669.31 : x
  2. Step 2: Convert to fraction form
    21,100.14/29,118.78 = 11,669.31/x
  3. Step 3: Cross multiply
    21,100.14x = 29,118.78 × 11,669.31
  4. Step 4: Simplify right side
    21,100.14x = 339,796,070.64
  5. Step 5: Solve for x
    x = 339,796,070.64/21,100.14
  6. Step 6: Final answer
    x = 16,103.97

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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.