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Finding the Fourth Proportional to 12,798,212.80, 19,207,816.80 and 12,378,308.80

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Solution

The fourth proportional to 12,798,212.80, 19,207,816.80 and 12,378,308.80 is: 18,577,616.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,798,212.80 : 19,207,816.80 = 12,378,308.80 : x
  2. Step 2: Convert to fraction form
    12,798,212.80/19,207,816.80 = 12,378,308.80/x
  3. Step 3: Cross multiply
    12,798,212.80x = 19,207,816.80 × 12,378,308.80
  4. Step 4: Simplify right side
    12,798,212.80x = 237,760,287,724,227.88
  5. Step 5: Solve for x
    x = 237,760,287,724,227.88/12,798,212.80
  6. Step 6: Final answer
    x = 18,577,616.38

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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.