Home / 21,680.82-29,912.07-13,180.29

Finding the Fourth Proportional to 21,680.82, 29,912.07 and 13,180.29

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Solution

The fourth proportional to 21,680.82, 29,912.07 and 13,180.29 is: 18,184.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,680.82 : 29,912.07 = 13,180.29 : x
  2. Step 2: Convert to fraction form
    21,680.82/29,912.07 = 13,180.29/x
  3. Step 3: Cross multiply
    21,680.82x = 29,912.07 × 13,180.29
  4. Step 4: Simplify right side
    21,680.82x = 394,249,757.10
  5. Step 5: Solve for x
    x = 394,249,757.10/21,680.82
  6. Step 6: Final answer
    x = 18,184.26

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1.5x scale

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.