Home / 7,621.80-11,429.68-3,239.40

Finding the Fourth Proportional to 7,621.80, 11,429.68 and 3,239.40

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Solution

The fourth proportional to 7,621.80, 11,429.68 and 3,239.40 is: 4,857.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,621.80 : 11,429.68 = 3,239.40 : x
  2. Step 2: Convert to fraction form
    7,621.80/11,429.68 = 3,239.40/x
  3. Step 3: Cross multiply
    7,621.80x = 11,429.68 × 3,239.40
  4. Step 4: Simplify right side
    7,621.80x = 37,025,305.39
  5. Step 5: Solve for x
    x = 37,025,305.39/7,621.80
  6. Step 6: Final answer
    x = 4,857.82

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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.