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Finding the Fourth Proportional to 19,218.73, 28,839.03 and 12,648.01

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Solution

The fourth proportional to 19,218.73, 28,839.03 and 12,648.01 is: 18,979.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,218.73 : 28,839.03 = 12,648.01 : x
  2. Step 2: Convert to fraction form
    19,218.73/28,839.03 = 12,648.01/x
  3. Step 3: Cross multiply
    19,218.73x = 28,839.03 × 12,648.01
  4. Step 4: Simplify right side
    19,218.73x = 364,756,168.44
  5. Step 5: Solve for x
    x = 364,756,168.44/19,218.73
  6. Step 6: Final answer
    x = 18,979.21

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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.