Home / 20,814.39-28,724.09-11,382.75

Finding the Fourth Proportional to 20,814.39, 28,724.09 and 11,382.75

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Solution

The fourth proportional to 20,814.39, 28,724.09 and 11,382.75 is: 15,708.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.39 : 28,724.09 = 11,382.75 : x
  2. Step 2: Convert to fraction form
    20,814.39/28,724.09 = 11,382.75/x
  3. Step 3: Cross multiply
    20,814.39x = 28,724.09 × 11,382.75
  4. Step 4: Simplify right side
    20,814.39x = 326,959,078.53
  5. Step 5: Solve for x
    x = 326,959,078.53/20,814.39
  6. Step 6: Final answer
    x = 15,708.32

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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.