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Finding the Fourth Proportional to 18,781,791.60, 28,206,901.80 and 16,430,329.20

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Solution

The fourth proportional to 18,781,791.60, 28,206,901.80 and 16,430,329.20 is: 24,675,424.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781,791.60 : 28,206,901.80 = 16,430,329.20 : x
  2. Step 2: Convert to fraction form
    18,781,791.60/28,206,901.80 = 16,430,329.20/x
  3. Step 3: Cross multiply
    18,781,791.60x = 28,206,901.80 × 16,430,329.20
  4. Step 4: Simplify right side
    18,781,791.60x = 463,448,682,286,072.56
  5. Step 5: Solve for x
    x = 463,448,682,286,072.56/18,781,791.60
  6. Step 6: Final answer
    x = 24,675,424.59

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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.