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Finding the Fourth Proportional to 21,906.66, 30,211.34 and 14,350.24

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Solution

The fourth proportional to 21,906.66, 30,211.34 and 14,350.24 is: 19,790.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,906.66 : 30,211.34 = 14,350.24 : x
  2. Step 2: Convert to fraction form
    21,906.66/30,211.34 = 14,350.24/x
  3. Step 3: Cross multiply
    21,906.66x = 30,211.34 × 14,350.24
  4. Step 4: Simplify right side
    21,906.66x = 433,539,940.07
  5. Step 5: Solve for x
    x = 433,539,940.07/21,906.66
  6. Step 6: Final answer
    x = 19,790.33

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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.