Home / 12,378,845.40-18,568,268.10-7,843,882.20

Finding the Fourth Proportional to 12,378,845.40, 18,568,268.10 and 7,843,882.20

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Solution

The fourth proportional to 12,378,845.40, 18,568,268.10 and 7,843,882.20 is: 11,765,823.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378,845.40 : 18,568,268.10 = 7,843,882.20 : x
  2. Step 2: Convert to fraction form
    12,378,845.40/18,568,268.10 = 7,843,882.20/x
  3. Step 3: Cross multiply
    12,378,845.40x = 18,568,268.10 × 7,843,882.20
  4. Step 4: Simplify right side
    12,378,845.40x = 145,647,307,634,417.84
  5. Step 5: Solve for x
    x = 145,647,307,634,417.84/12,378,845.40
  6. Step 6: Final answer
    x = 11,765,823.30

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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.