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Finding the Fourth Proportional to 12,789.29, 19,187.89 and 6,553.71

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Solution

The fourth proportional to 12,789.29, 19,187.89 and 6,553.71 is: 9,832.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,789.29 : 19,187.89 = 6,553.71 : x
  2. Step 2: Convert to fraction form
    12,789.29/19,187.89 = 6,553.71/x
  3. Step 3: Cross multiply
    12,789.29x = 19,187.89 × 6,553.71
  4. Step 4: Simplify right side
    12,789.29x = 125,751,850.19
  5. Step 5: Solve for x
    x = 125,751,850.19/12,789.29
  6. Step 6: Final answer
    x = 9,832.59

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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.