Home / 12,900,890.40-19,328,634.88-12,132,859.68

Finding the Fourth Proportional to 12,900,890.40, 19,328,634.88 and 12,132,859.68

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Solution

The fourth proportional to 12,900,890.40, 19,328,634.88 and 12,132,859.68 is: 18,177,940.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,900,890.40 : 19,328,634.88 = 12,132,859.68 : x
  2. Step 2: Convert to fraction form
    12,900,890.40/19,328,634.88 = 12,132,859.68/x
  3. Step 3: Cross multiply
    12,900,890.40x = 19,328,634.88 × 12,132,859.68
  4. Step 4: Simplify right side
    12,900,890.40x = 234,511,614,804,993.62
  5. Step 5: Solve for x
    x = 234,511,614,804,993.62/12,900,890.40
  6. Step 6: Final answer
    x = 18,177,940.25

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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.