Home / 20,138,642.30-30,207,963.45-12,485,891.90

Finding the Fourth Proportional to 20,138,642.30, 30,207,963.45 and 12,485,891.90

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Solution

The fourth proportional to 20,138,642.30, 30,207,963.45 and 12,485,891.90 is: 18,728,837.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138,642.30 : 30,207,963.45 = 12,485,891.90 : x
  2. Step 2: Convert to fraction form
    20,138,642.30/30,207,963.45 = 12,485,891.90/x
  3. Step 3: Cross multiply
    20,138,642.30x = 30,207,963.45 × 12,485,891.90
  4. Step 4: Simplify right side
    20,138,642.30x = 377,173,366,155,851.06
  5. Step 5: Solve for x
    x = 377,173,366,155,851.06/20,138,642.30
  6. Step 6: Final answer
    x = 18,728,837.85

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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.