Home / 5,121.56-7,675.20-3,871.13

Finding the Fourth Proportional to 5,121.56, 7,675.20 and 3,871.13

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Solution

The fourth proportional to 5,121.56, 7,675.20 and 3,871.13 is: 5,801.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.56 : 7,675.20 = 3,871.13 : x
  2. Step 2: Convert to fraction form
    5,121.56/7,675.20 = 3,871.13/x
  3. Step 3: Cross multiply
    5,121.56x = 7,675.20 × 3,871.13
  4. Step 4: Simplify right side
    5,121.56x = 29,711,658.60
  5. Step 5: Solve for x
    x = 29,711,658.60/5,121.56
  6. Step 6: Final answer
    x = 5,801.29

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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.