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Finding the Fourth Proportional to 19,153.80, 28,679.52 and 11,249.76

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Solution

The fourth proportional to 19,153.80, 28,679.52 and 11,249.76 is: 16,844.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,153.80 : 28,679.52 = 11,249.76 : x
  2. Step 2: Convert to fraction form
    19,153.80/28,679.52 = 11,249.76/x
  3. Step 3: Cross multiply
    19,153.80x = 28,679.52 × 11,249.76
  4. Step 4: Simplify right side
    19,153.80x = 322,637,716.92
  5. Step 5: Solve for x
    x = 322,637,716.92/19,153.80
  6. Step 6: Final answer
    x = 16,844.58

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.