Home / 21,685.31-29,914.18-13,190.03

Finding the Fourth Proportional to 21,685.31, 29,914.18 and 13,190.03

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Solution

The fourth proportional to 21,685.31, 29,914.18 and 13,190.03 is: 18,195.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,685.31 : 29,914.18 = 13,190.03 : x
  2. Step 2: Convert to fraction form
    21,685.31/29,914.18 = 13,190.03/x
  3. Step 3: Cross multiply
    21,685.31x = 29,914.18 × 13,190.03
  4. Step 4: Simplify right side
    21,685.31x = 394,568,749.08
  5. Step 5: Solve for x
    x = 394,568,749.08/21,685.31
  6. Step 6: Final answer
    x = 18,195.21

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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.