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Finding the Fourth Proportional to 18,775.27, 25,908.09 and 11,220.09

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Solution

The fourth proportional to 18,775.27, 25,908.09 and 11,220.09 is: 15,482.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775.27 : 25,908.09 = 11,220.09 : x
  2. Step 2: Convert to fraction form
    18,775.27/25,908.09 = 11,220.09/x
  3. Step 3: Cross multiply
    18,775.27x = 25,908.09 × 11,220.09
  4. Step 4: Simplify right side
    18,775.27x = 290,691,129.58
  5. Step 5: Solve for x
    x = 290,691,129.58/18,775.27
  6. Step 6: Final answer
    x = 15,482.66

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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.