Home / 7,140.74-9,855.15-3,997.94

Finding the Fourth Proportional to 7,140.74, 9,855.15 and 3,997.94

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Solution

The fourth proportional to 7,140.74, 9,855.15 and 3,997.94 is: 5,517.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.74 : 9,855.15 = 3,997.94 : x
  2. Step 2: Convert to fraction form
    7,140.74/9,855.15 = 3,997.94/x
  3. Step 3: Cross multiply
    7,140.74x = 9,855.15 × 3,997.94
  4. Step 4: Simplify right side
    7,140.74x = 39,400,298.39
  5. Step 5: Solve for x
    x = 39,400,298.39/7,140.74
  6. Step 6: Final answer
    x = 5,517.68

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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.