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Finding the Fourth Proportional to 19,171,991.90, 28,757,987.85 and 14,888,971.10

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Solution

The fourth proportional to 19,171,991.90, 28,757,987.85 and 14,888,971.10 is: 22,333,456.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,171,991.90 : 28,757,987.85 = 14,888,971.10 : x
  2. Step 2: Convert to fraction form
    19,171,991.90/28,757,987.85 = 14,888,971.10/x
  3. Step 3: Cross multiply
    19,171,991.90x = 28,757,987.85 × 14,888,971.10
  4. Step 4: Simplify right side
    19,171,991.90x = 428,176,849,992,801.12
  5. Step 5: Solve for x
    x = 428,176,849,992,801.12/19,171,991.90
  6. Step 6: Final answer
    x = 22,333,456.65

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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.