Home / 20,661.92-28,513.32-11,711.12

Finding the Fourth Proportional to 20,661.92, 28,513.32 and 11,711.12

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Solution

The fourth proportional to 20,661.92, 28,513.32 and 11,711.12 is: 16,161.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.92 : 28,513.32 = 11,711.12 : x
  2. Step 2: Convert to fraction form
    20,661.92/28,513.32 = 11,711.12/x
  3. Step 3: Cross multiply
    20,661.92x = 28,513.32 × 11,711.12
  4. Step 4: Simplify right side
    20,661.92x = 333,922,769.55
  5. Step 5: Solve for x
    x = 333,922,769.55/20,661.92
  6. Step 6: Final answer
    x = 16,161.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.