Home / 18,910,590.72-28,355,932.80-12,928,669.44

Finding the Fourth Proportional to 18,910,590.72, 28,355,932.80 and 12,928,669.44

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Solution

The fourth proportional to 18,910,590.72, 28,355,932.80 and 12,928,669.44 is: 19,386,199.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,910,590.72 : 28,355,932.80 = 12,928,669.44 : x
  2. Step 2: Convert to fraction form
    18,910,590.72/28,355,932.80 = 12,928,669.44/x
  3. Step 3: Cross multiply
    18,910,590.72x = 28,355,932.80 × 12,928,669.44
  4. Step 4: Simplify right side
    18,910,590.72x = 366,604,481,834,053.62
  5. Step 5: Solve for x
    x = 366,604,481,834,053.62/18,910,590.72
  6. Step 6: Final answer
    x = 19,386,199.37

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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.