Home / 20,816.36-28,724.60-11,863.64

Finding the Fourth Proportional to 20,816.36, 28,724.60 and 11,863.64

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Solution

The fourth proportional to 20,816.36, 28,724.60 and 11,863.64 is: 16,370.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.36 : 28,724.60 = 11,863.64 : x
  2. Step 2: Convert to fraction form
    20,816.36/28,724.60 = 11,863.64/x
  3. Step 3: Cross multiply
    20,816.36x = 28,724.60 × 11,863.64
  4. Step 4: Simplify right side
    20,816.36x = 340,778,313.54
  5. Step 5: Solve for x
    x = 340,778,313.54/20,816.36
  6. Step 6: Final answer
    x = 16,370.70

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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.