Home / 5,385.55-7,431.99-3,147.79

Finding the Fourth Proportional to 5,385.55, 7,431.99 and 3,147.79

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Solution

The fourth proportional to 5,385.55, 7,431.99 and 3,147.79 is: 4,343.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.55 : 7,431.99 = 3,147.79 : x
  2. Step 2: Convert to fraction form
    5,385.55/7,431.99 = 3,147.79/x
  3. Step 3: Cross multiply
    5,385.55x = 7,431.99 × 3,147.79
  4. Step 4: Simplify right side
    5,385.55x = 23,394,343.80
  5. Step 5: Solve for x
    x = 23,394,343.80/5,385.55
  6. Step 6: Final answer
    x = 4,343.91

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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.