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Finding the Fourth Proportional to 13,802,986.80, 20,704,285.80 and 6,229,940.40

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Solution

The fourth proportional to 13,802,986.80, 20,704,285.80 and 6,229,940.40 is: 9,344,822.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,802,986.80 : 20,704,285.80 = 6,229,940.40 : x
  2. Step 2: Convert to fraction form
    13,802,986.80/20,704,285.80 = 6,229,940.40/x
  3. Step 3: Cross multiply
    13,802,986.80x = 20,704,285.80 × 6,229,940.40
  4. Step 4: Simplify right side
    13,802,986.80x = 128,986,466,558,566.33
  5. Step 5: Solve for x
    x = 128,986,466,558,566.33/13,802,986.80
  6. Step 6: Final answer
    x = 9,344,822.86

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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.