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Finding the Fourth Proportional to 18,950,488.80, 28,383,742.80 and 15,591,256.80

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Solution

The fourth proportional to 18,950,488.80, 28,383,742.80 and 15,591,256.80 is: 23,352,338.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,950,488.80 : 28,383,742.80 = 15,591,256.80 : x
  2. Step 2: Convert to fraction form
    18,950,488.80/28,383,742.80 = 15,591,256.80/x
  3. Step 3: Cross multiply
    18,950,488.80x = 28,383,742.80 × 15,591,256.80
  4. Step 4: Simplify right side
    18,950,488.80x = 442,538,222,939,951.06
  5. Step 5: Solve for x
    x = 442,538,222,939,951.06/18,950,488.80
  6. Step 6: Final answer
    x = 23,352,338.17

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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.