Home / 3,613.42-5,420.34-1,421.56

Finding the Fourth Proportional to 3,613.42, 5,420.34 and 1,421.56

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Solution

The fourth proportional to 3,613.42, 5,420.34 and 1,421.56 is: 2,132.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.42 : 5,420.34 = 1,421.56 : x
  2. Step 2: Convert to fraction form
    3,613.42/5,420.34 = 1,421.56/x
  3. Step 3: Cross multiply
    3,613.42x = 5,420.34 × 1,421.56
  4. Step 4: Simplify right side
    3,613.42x = 7,705,338.53
  5. Step 5: Solve for x
    x = 7,705,338.53/3,613.42
  6. Step 6: Final answer
    x = 2,132.42

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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.