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Finding the Fourth Proportional to 13,893,620.80, 20,840,431.20 and 12,214,004.80

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Solution

The fourth proportional to 13,893,620.80, 20,840,431.20 and 12,214,004.80 is: 18,321,007.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,893,620.80 : 20,840,431.20 = 12,214,004.80 : x
  2. Step 2: Convert to fraction form
    13,893,620.80/20,840,431.20 = 12,214,004.80/x
  3. Step 3: Cross multiply
    13,893,620.80x = 20,840,431.20 × 12,214,004.80
  4. Step 4: Simplify right side
    13,893,620.80x = 254,545,126,710,869.78
  5. Step 5: Solve for x
    x = 254,545,126,710,869.78/13,893,620.80
  6. Step 6: Final answer
    x = 18,321,007.20

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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.