Home / 12,112.92-18,169.53-7,979.40

Finding the Fourth Proportional to 12,112.92, 18,169.53 and 7,979.40

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Solution

The fourth proportional to 12,112.92, 18,169.53 and 7,979.40 is: 11,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,112.92 : 18,169.53 = 7,979.40 : x
  2. Step 2: Convert to fraction form
    12,112.92/18,169.53 = 7,979.40/x
  3. Step 3: Cross multiply
    12,112.92x = 18,169.53 × 7,979.40
  4. Step 4: Simplify right side
    12,112.92x = 144,981,947.68
  5. Step 5: Solve for x
    x = 144,981,947.68/12,112.92
  6. Step 6: Final answer
    x = 11,969.20

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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.