Home / 2,790.71-3,850.96-1,531.76

Finding the Fourth Proportional to 2,790.71, 3,850.96 and 1,531.76

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Solution

The fourth proportional to 2,790.71, 3,850.96 and 1,531.76 is: 2,113.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.71 : 3,850.96 = 1,531.76 : x
  2. Step 2: Convert to fraction form
    2,790.71/3,850.96 = 1,531.76/x
  3. Step 3: Cross multiply
    2,790.71x = 3,850.96 × 1,531.76
  4. Step 4: Simplify right side
    2,790.71x = 5,898,747.94
  5. Step 5: Solve for x
    x = 5,898,747.94/2,790.71
  6. Step 6: Final answer
    x = 2,113.71

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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.