Home / 20,858,716.20-31,288,074.30-13,205,965.80

Finding the Fourth Proportional to 20,858,716.20, 31,288,074.30 and 13,205,965.80

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Solution

The fourth proportional to 20,858,716.20, 31,288,074.30 and 13,205,965.80 is: 19,808,948.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858,716.20 : 31,288,074.30 = 13,205,965.80 : x
  2. Step 2: Convert to fraction form
    20,858,716.20/31,288,074.30 = 13,205,965.80/x
  3. Step 3: Cross multiply
    20,858,716.20x = 31,288,074.30 × 13,205,965.80
  4. Step 4: Simplify right side
    20,858,716.20x = 413,189,239,153,659
  5. Step 5: Solve for x
    x = 413,189,239,153,659/20,858,716.20
  6. Step 6: Final answer
    x = 19,808,948.70

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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.