Home / 20,376.27-28,120.41-11,426.64

Finding the Fourth Proportional to 20,376.27, 28,120.41 and 11,426.64

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Solution

The fourth proportional to 20,376.27, 28,120.41 and 11,426.64 is: 15,769.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.27 : 28,120.41 = 11,426.64 : x
  2. Step 2: Convert to fraction form
    20,376.27/28,120.41 = 11,426.64/x
  3. Step 3: Cross multiply
    20,376.27x = 28,120.41 × 11,426.64
  4. Step 4: Simplify right side
    20,376.27x = 321,321,801.72
  5. Step 5: Solve for x
    x = 321,321,801.72/20,376.27
  6. Step 6: Final answer
    x = 15,769.41

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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.