Home / 7,309.20-10,958.40-3,145.80

Finding the Fourth Proportional to 7,309.20, 10,958.40 and 3,145.80

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Solution

The fourth proportional to 7,309.20, 10,958.40 and 3,145.80 is: 4,716.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,309.20 : 10,958.40 = 3,145.80 : x
  2. Step 2: Convert to fraction form
    7,309.20/10,958.40 = 3,145.80/x
  3. Step 3: Cross multiply
    7,309.20x = 10,958.40 × 3,145.80
  4. Step 4: Simplify right side
    7,309.20x = 34,472,934.72
  5. Step 5: Solve for x
    x = 34,472,934.72/7,309.20
  6. Step 6: Final answer
    x = 4,716.38

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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.