Home / 20,491,894.64-28,278,842.16-11,789,892.72

Finding the Fourth Proportional to 20,491,894.64, 28,278,842.16 and 11,789,892.72

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Solution

The fourth proportional to 20,491,894.64, 28,278,842.16 and 11,789,892.72 is: 16,270,067.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491,894.64 : 28,278,842.16 = 11,789,892.72 : x
  2. Step 2: Convert to fraction form
    20,491,894.64/28,278,842.16 = 11,789,892.72/x
  3. Step 3: Cross multiply
    20,491,894.64x = 28,278,842.16 × 11,789,892.72
  4. Step 4: Simplify right side
    20,491,894.64x = 333,404,515,312,213.12
  5. Step 5: Solve for x
    x = 333,404,515,312,213.12/20,491,894.64
  6. Step 6: Final answer
    x = 16,270,067.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.