Home / 20,691,987,455.20-31,037,981,182.80-11,984,858,111.20

Finding the Fourth Proportional to 20,691,987,455.20, 31,037,981,182.80 and 11,984,858,111.20

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Solution

The fourth proportional to 20,691,987,455.20, 31,037,981,182.80 and 11,984,858,111.20 is: 17,977,287,166.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691,987,455.20 : 31,037,981,182.80 = 11,984,858,111.20 : x
  2. Step 2: Convert to fraction form
    20,691,987,455.20/31,037,981,182.80 = 11,984,858,111.20/x
  3. Step 3: Cross multiply
    20,691,987,455.20x = 31,037,981,182.80 × 11,984,858,111.20
  4. Step 4: Simplify right side
    20,691,987,455.20x = 371,985,800,533,953,544,192
  5. Step 5: Solve for x
    x = 371,985,800,533,953,544,192/20,691,987,455.20
  6. Step 6: Final answer
    x = 17,977,287,166.80

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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.