Home / 20,376.09-28,115.91-11,422.35

Finding the Fourth Proportional to 20,376.09, 28,115.91 and 11,422.35

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Solution

The fourth proportional to 20,376.09, 28,115.91 and 11,422.35 is: 15,761.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.09 : 28,115.91 = 11,422.35 : x
  2. Step 2: Convert to fraction form
    20,376.09/28,115.91 = 11,422.35/x
  3. Step 3: Cross multiply
    20,376.09x = 28,115.91 × 11,422.35
  4. Step 4: Simplify right side
    20,376.09x = 321,149,764.59
  5. Step 5: Solve for x
    x = 321,149,764.59/20,376.09
  6. Step 6: Final answer
    x = 15,761.11

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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.