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Finding the Fourth Proportional to 19,191.72, 28,791.48 and 8,098.40

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Solution

The fourth proportional to 19,191.72, 28,791.48 and 8,098.40 is: 12,149.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,191.72 : 28,791.48 = 8,098.40 : x
  2. Step 2: Convert to fraction form
    19,191.72/28,791.48 = 8,098.40/x
  3. Step 3: Cross multiply
    19,191.72x = 28,791.48 × 8,098.40
  4. Step 4: Simplify right side
    19,191.72x = 233,164,921.63
  5. Step 5: Solve for x
    x = 233,164,921.63/19,191.72
  6. Step 6: Final answer
    x = 12,149.25

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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.