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Finding the Fourth Proportional to 18,660,012.68, 27,978,471.66 and 7,287,087.80

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Solution

The fourth proportional to 18,660,012.68, 27,978,471.66 and 7,287,087.80 is: 10,926,122.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,660,012.68 : 27,978,471.66 = 7,287,087.80 : x
  2. Step 2: Convert to fraction form
    18,660,012.68/27,978,471.66 = 7,287,087.80/x
  3. Step 3: Cross multiply
    18,660,012.68x = 27,978,471.66 × 7,287,087.80
  4. Step 4: Simplify right side
    18,660,012.68x = 203,881,579,374,644.44
  5. Step 5: Solve for x
    x = 203,881,579,374,644.44/18,660,012.68
  6. Step 6: Final answer
    x = 10,926,122.23

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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.