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Finding the Fourth Proportional to 12,891.52, 19,369.56 and 8,213.52

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Solution

The fourth proportional to 12,891.52, 19,369.56 and 8,213.52 is: 12,340.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.52 : 19,369.56 = 8,213.52 : x
  2. Step 2: Convert to fraction form
    12,891.52/19,369.56 = 8,213.52/x
  3. Step 3: Cross multiply
    12,891.52x = 19,369.56 × 8,213.52
  4. Step 4: Simplify right side
    12,891.52x = 159,092,268.45
  5. Step 5: Solve for x
    x = 159,092,268.45/12,891.52
  6. Step 6: Final answer
    x = 12,340.85

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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.