Home / 5,149.30-7,107.20-2,912.47

Finding the Fourth Proportional to 5,149.30, 7,107.20 and 2,912.47

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Solution

The fourth proportional to 5,149.30, 7,107.20 and 2,912.47 is: 4,019.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,149.30 : 7,107.20 = 2,912.47 : x
  2. Step 2: Convert to fraction form
    5,149.30/7,107.20 = 2,912.47/x
  3. Step 3: Cross multiply
    5,149.30x = 7,107.20 × 2,912.47
  4. Step 4: Simplify right side
    5,149.30x = 20,699,506.78
  5. Step 5: Solve for x
    x = 20,699,506.78/5,149.30
  6. Step 6: Final answer
    x = 4,019.87

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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.