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Finding the Fourth Proportional to 12,879,809.20, 19,319,713.80 and 6,907,841.20

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Solution

The fourth proportional to 12,879,809.20, 19,319,713.80 and 6,907,841.20 is: 10,361,761.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879,809.20 : 19,319,713.80 = 6,907,841.20 : x
  2. Step 2: Convert to fraction form
    12,879,809.20/19,319,713.80 = 6,907,841.20/x
  3. Step 3: Cross multiply
    12,879,809.20x = 19,319,713.80 × 6,907,841.20
  4. Step 4: Simplify right side
    12,879,809.20x = 133,457,514,959,848.56
  5. Step 5: Solve for x
    x = 133,457,514,959,848.56/12,879,809.20
  6. Step 6: Final answer
    x = 10,361,761.80

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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.