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Finding the Fourth Proportional to 19,903,787.87, 29,844,978.86 and 11,709,262.90

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Solution

The fourth proportional to 19,903,787.87, 29,844,978.86 and 11,709,262.90 is: 17,557,597.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,903,787.87 : 29,844,978.86 = 11,709,262.90 : x
  2. Step 2: Convert to fraction form
    19,903,787.87/29,844,978.86 = 11,709,262.90/x
  3. Step 3: Cross multiply
    19,903,787.87x = 29,844,978.86 × 11,709,262.90
  4. Step 4: Simplify right side
    19,903,787.87x = 349,462,703,671,343.06
  5. Step 5: Solve for x
    x = 349,462,703,671,343.06/19,903,787.87
  6. Step 6: Final answer
    x = 17,557,597.88

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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.