Home / 20,839.32-28,758.24-11,408.22

Finding the Fourth Proportional to 20,839.32, 28,758.24 and 11,408.22

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Solution

The fourth proportional to 20,839.32, 28,758.24 and 11,408.22 is: 15,743.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.32 : 28,758.24 = 11,408.22 : x
  2. Step 2: Convert to fraction form
    20,839.32/28,758.24 = 11,408.22/x
  3. Step 3: Cross multiply
    20,839.32x = 28,758.24 × 11,408.22
  4. Step 4: Simplify right side
    20,839.32x = 328,080,328.73
  5. Step 5: Solve for x
    x = 328,080,328.73/20,839.32
  6. Step 6: Final answer
    x = 15,743.33

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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.