Home / 20,839.68-28,758.42-11,408.04

Finding the Fourth Proportional to 20,839.68, 28,758.42 and 11,408.04

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Solution

The fourth proportional to 20,839.68, 28,758.42 and 11,408.04 is: 15,742.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.68 : 28,758.42 = 11,408.04 : x
  2. Step 2: Convert to fraction form
    20,839.68/28,758.42 = 11,408.04/x
  3. Step 3: Cross multiply
    20,839.68x = 28,758.42 × 11,408.04
  4. Step 4: Simplify right side
    20,839.68x = 328,077,205.70
  5. Step 5: Solve for x
    x = 328,077,205.70/20,839.68
  6. Step 6: Final answer
    x = 15,742.91

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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.