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Finding the Fourth Proportional to 18,272.25, 25,220.43 and 11,914.70

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Solution

The fourth proportional to 18,272.25, 25,220.43 and 11,914.70 is: 16,445.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,272.25 : 25,220.43 = 11,914.70 : x
  2. Step 2: Convert to fraction form
    18,272.25/25,220.43 = 11,914.70/x
  3. Step 3: Cross multiply
    18,272.25x = 25,220.43 × 11,914.70
  4. Step 4: Simplify right side
    18,272.25x = 300,493,731.22
  5. Step 5: Solve for x
    x = 300,493,731.22/18,272.25
  6. Step 6: Final answer
    x = 16,445.36

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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.