Home / 18,940.85-28,408.04-5,613.56

Finding the Fourth Proportional to 18,940.85, 28,408.04 and 5,613.56

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Solution

The fourth proportional to 18,940.85, 28,408.04 and 5,613.56 is: 8,419.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.85 : 28,408.04 = 5,613.56 : x
  2. Step 2: Convert to fraction form
    18,940.85/28,408.04 = 5,613.56/x
  3. Step 3: Cross multiply
    18,940.85x = 28,408.04 × 5,613.56
  4. Step 4: Simplify right side
    18,940.85x = 159,470,066.91
  5. Step 5: Solve for x
    x = 159,470,066.91/18,940.85
  6. Step 6: Final answer
    x = 8,419.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.