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Finding the Fourth Proportional to 19,251.80, 28,855.78 and 8,151.56

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Solution

The fourth proportional to 19,251.80, 28,855.78 and 8,151.56 is: 12,218.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,251.80 : 28,855.78 = 8,151.56 : x
  2. Step 2: Convert to fraction form
    19,251.80/28,855.78 = 8,151.56/x
  3. Step 3: Cross multiply
    19,251.80x = 28,855.78 × 8,151.56
  4. Step 4: Simplify right side
    19,251.80x = 235,219,622.02
  5. Step 5: Solve for x
    x = 235,219,622.02/19,251.80
  6. Step 6: Final answer
    x = 12,218.06

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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.