Home / 4,789.80-7,187.13-3,147.12

Finding the Fourth Proportional to 4,789.80, 7,187.13 and 3,147.12

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Solution

The fourth proportional to 4,789.80, 7,187.13 and 3,147.12 is: 4,722.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,789.80 : 7,187.13 = 3,147.12 : x
  2. Step 2: Convert to fraction form
    4,789.80/7,187.13 = 3,147.12/x
  3. Step 3: Cross multiply
    4,789.80x = 7,187.13 × 3,147.12
  4. Step 4: Simplify right side
    4,789.80x = 22,618,760.57
  5. Step 5: Solve for x
    x = 22,618,760.57/4,789.80
  6. Step 6: Final answer
    x = 4,722.28

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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.