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Finding the Fourth Proportional to 21,110.22, 29,119.42 and 13,940.22

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Solution

The fourth proportional to 21,110.22, 29,119.42 and 13,940.22 is: 19,229.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.22 : 29,119.42 = 13,940.22 : x
  2. Step 2: Convert to fraction form
    21,110.22/29,119.42 = 13,940.22/x
  3. Step 3: Cross multiply
    21,110.22x = 29,119.42 × 13,940.22
  4. Step 4: Simplify right side
    21,110.22x = 405,931,121.07
  5. Step 5: Solve for x
    x = 405,931,121.07/21,110.22
  6. Step 6: Final answer
    x = 19,229.13

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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.