Home / 21,110.23-29,119.42-13,940.21

Finding the Fourth Proportional to 21,110.23, 29,119.42 and 13,940.21

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Solution

The fourth proportional to 21,110.23, 29,119.42 and 13,940.21 is: 19,229.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.23 : 29,119.42 = 13,940.21 : x
  2. Step 2: Convert to fraction form
    21,110.23/29,119.42 = 13,940.21/x
  3. Step 3: Cross multiply
    21,110.23x = 29,119.42 × 13,940.21
  4. Step 4: Simplify right side
    21,110.23x = 405,930,829.88
  5. Step 5: Solve for x
    x = 405,930,829.88/21,110.23
  6. Step 6: Final answer
    x = 19,229.11

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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.