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Finding the Fourth Proportional to 19,888,636.65, 27,446,042.95 and 11,186,815.16

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Solution

The fourth proportional to 19,888,636.65, 27,446,042.95 and 11,186,815.16 is: 15,437,649.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,888,636.65 : 27,446,042.95 = 11,186,815.16 : x
  2. Step 2: Convert to fraction form
    19,888,636.65/27,446,042.95 = 11,186,815.16/x
  3. Step 3: Cross multiply
    19,888,636.65x = 27,446,042.95 × 11,186,815.16
  4. Step 4: Simplify right side
    19,888,636.65x = 307,033,809,189,873.88
  5. Step 5: Solve for x
    x = 307,033,809,189,873.88/19,888,636.65
  6. Step 6: Final answer
    x = 15,437,649.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.