Home / 11,979.78-17,947.77-8,684.70

Finding the Fourth Proportional to 11,979.78, 17,947.77 and 8,684.70

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Solution

The fourth proportional to 11,979.78, 17,947.77 and 8,684.70 is: 13,011.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,979.78 : 17,947.77 = 8,684.70 : x
  2. Step 2: Convert to fraction form
    11,979.78/17,947.77 = 8,684.70/x
  3. Step 3: Cross multiply
    11,979.78x = 17,947.77 × 8,684.70
  4. Step 4: Simplify right side
    11,979.78x = 155,870,998.12
  5. Step 5: Solve for x
    x = 155,870,998.12/11,979.78
  6. Step 6: Final answer
    x = 13,011.17

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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.