Home / 7,141.52-9,855.30-3,997.70

Finding the Fourth Proportional to 7,141.52, 9,855.30 and 3,997.70

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Solution

The fourth proportional to 7,141.52, 9,855.30 and 3,997.70 is: 5,516.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,141.52 : 9,855.30 = 3,997.70 : x
  2. Step 2: Convert to fraction form
    7,141.52/9,855.30 = 3,997.70/x
  3. Step 3: Cross multiply
    7,141.52x = 9,855.30 × 3,997.70
  4. Step 4: Simplify right side
    7,141.52x = 39,398,532.81
  5. Step 5: Solve for x
    x = 39,398,532.81/7,141.52
  6. Step 6: Final answer
    x = 5,516.83

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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.