Home / 20,874.42-28,806.80-11,314.35

Finding the Fourth Proportional to 20,874.42, 28,806.80 and 11,314.35

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Solution

The fourth proportional to 20,874.42, 28,806.80 and 11,314.35 is: 15,613.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.42 : 28,806.80 = 11,314.35 : x
  2. Step 2: Convert to fraction form
    20,874.42/28,806.80 = 11,314.35/x
  3. Step 3: Cross multiply
    20,874.42x = 28,806.80 × 11,314.35
  4. Step 4: Simplify right side
    20,874.42x = 325,930,161.01
  5. Step 5: Solve for x
    x = 325,930,161.01/20,874.42
  6. Step 6: Final answer
    x = 15,613.85

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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.