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Finding the Fourth Proportional to 12,789.19, 19,179.19 and 4,893.92

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Solution

The fourth proportional to 12,789.19, 19,179.19 and 4,893.92 is: 7,339.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,789.19 : 19,179.19 = 4,893.92 : x
  2. Step 2: Convert to fraction form
    12,789.19/19,179.19 = 4,893.92/x
  3. Step 3: Cross multiply
    12,789.19x = 19,179.19 × 4,893.92
  4. Step 4: Simplify right side
    12,789.19x = 93,861,301.16
  5. Step 5: Solve for x
    x = 93,861,301.16/12,789.19
  6. Step 6: Final answer
    x = 7,339.12

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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.