Home / 3,900-5,849.88-1,126.74

Finding the Fourth Proportional to 3,900, 5,849.88 and 1,126.74

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Solution

The fourth proportional to 3,900, 5,849.88 and 1,126.74 is: 1,690.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900 : 5,849.88 = 1,126.74 : x
  2. Step 2: Convert to fraction form
    3,900/5,849.88 = 1,126.74/x
  3. Step 3: Cross multiply
    3,900x = 5,849.88 × 1,126.74
  4. Step 4: Simplify right side
    3,900x = 6,591,293.79
  5. Step 5: Solve for x
    x = 6,591,293.79/3,900
  6. Step 6: Final answer
    x = 1,690.08

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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.