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Finding the Fourth Proportional to 18,805,932.40, 28,218,229.80 and 7,446,751.60

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Solution

The fourth proportional to 18,805,932.40, 28,218,229.80 and 7,446,751.60 is: 11,173,822.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805,932.40 : 28,218,229.80 = 7,446,751.60 : x
  2. Step 2: Convert to fraction form
    18,805,932.40/28,218,229.80 = 7,446,751.60/x
  3. Step 3: Cross multiply
    18,805,932.40x = 28,218,229.80 × 7,446,751.60
  4. Step 4: Simplify right side
    18,805,932.40x = 210,134,147,912,317.69
  5. Step 5: Solve for x
    x = 210,134,147,912,317.69/18,805,932.40
  6. Step 6: Final answer
    x = 11,173,822.36

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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.