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Finding the Fourth Proportional to 20,767,691.80, 31,151,537.70 and 11,809,739.80

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Solution

The fourth proportional to 20,767,691.80, 31,151,537.70 and 11,809,739.80 is: 17,714,609.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,767,691.80 : 31,151,537.70 = 11,809,739.80 : x
  2. Step 2: Convert to fraction form
    20,767,691.80/31,151,537.70 = 11,809,739.80/x
  3. Step 3: Cross multiply
    20,767,691.80x = 31,151,537.70 × 11,809,739.80
  4. Step 4: Simplify right side
    20,767,691.80x = 367,891,554,606,890.50
  5. Step 5: Solve for x
    x = 367,891,554,606,890.50/20,767,691.80
  6. Step 6: Final answer
    x = 17,714,609.70

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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.