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Finding the Fourth Proportional to 19,218.72, 28,819.02 and 9,863.22

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Solution

The fourth proportional to 19,218.72, 28,819.02 and 9,863.22 is: 14,790.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,218.72 : 28,819.02 = 9,863.22 : x
  2. Step 2: Convert to fraction form
    19,218.72/28,819.02 = 9,863.22/x
  3. Step 3: Cross multiply
    19,218.72x = 28,819.02 × 9,863.22
  4. Step 4: Simplify right side
    19,218.72x = 284,248,334.44
  5. Step 5: Solve for x
    x = 284,248,334.44/19,218.72
  6. Step 6: Final answer
    x = 14,790.18

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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.