Home / 12,945,419.40-19,422,794.70-12,478,859.40

Finding the Fourth Proportional to 12,945,419.40, 19,422,794.70 and 12,478,859.40

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Solution

The fourth proportional to 12,945,419.40, 19,422,794.70 and 12,478,859.40 is: 18,722,786.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945,419.40 : 19,422,794.70 = 12,478,859.40 : x
  2. Step 2: Convert to fraction form
    12,945,419.40/19,422,794.70 = 12,478,859.40/x
  3. Step 3: Cross multiply
    12,945,419.40x = 19,422,794.70 × 12,478,859.40
  4. Step 4: Simplify right side
    12,945,419.40x = 242,374,324,216,365.19
  5. Step 5: Solve for x
    x = 242,374,324,216,365.19/12,945,419.40
  6. Step 6: Final answer
    x = 18,722,786.55

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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.