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Finding the Fourth Proportional to 19,152,648.60, 28,728,972.90 and 18,018,907.80

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Solution

The fourth proportional to 19,152,648.60, 28,728,972.90 and 18,018,907.80 is: 27,028,361.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,152,648.60 : 28,728,972.90 = 18,018,907.80 : x
  2. Step 2: Convert to fraction form
    19,152,648.60/28,728,972.90 = 18,018,907.80/x
  3. Step 3: Cross multiply
    19,152,648.60x = 28,728,972.90 × 18,018,907.80
  4. Step 4: Simplify right side
    19,152,648.60x = 517,664,713,873,798.62
  5. Step 5: Solve for x
    x = 517,664,713,873,798.62/19,152,648.60
  6. Step 6: Final answer
    x = 27,028,361.70

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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.