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Finding the Fourth Proportional to 18,757.30, 28,104.71 and 13,198.97

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Solution

The fourth proportional to 18,757.30, 28,104.71 and 13,198.97 is: 19,776.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.30 : 28,104.71 = 13,198.97 : x
  2. Step 2: Convert to fraction form
    18,757.30/28,104.71 = 13,198.97/x
  3. Step 3: Cross multiply
    18,757.30x = 28,104.71 × 13,198.97
  4. Step 4: Simplify right side
    18,757.30x = 370,953,142.17
  5. Step 5: Solve for x
    x = 370,953,142.17/18,757.30
  6. Step 6: Final answer
    x = 19,776.47

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1.5x scale

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.