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Finding the Fourth Proportional to 18,471,805.20, 27,707,707.80 and 18,219,862.80

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Solution

The fourth proportional to 18,471,805.20, 27,707,707.80 and 18,219,862.80 is: 27,329,794.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,471,805.20 : 27,707,707.80 = 18,219,862.80 : x
  2. Step 2: Convert to fraction form
    18,471,805.20/27,707,707.80 = 18,219,862.80/x
  3. Step 3: Cross multiply
    18,471,805.20x = 27,707,707.80 × 18,219,862.80
  4. Step 4: Simplify right side
    18,471,805.20x = 504,830,634,618,489.88
  5. Step 5: Solve for x
    x = 504,830,634,618,489.88/18,471,805.20
  6. Step 6: Final answer
    x = 27,329,794.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.