Home / 5,148.74-7,105.31-2,790.87

Finding the Fourth Proportional to 5,148.74, 7,105.31 and 2,790.87

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Solution

The fourth proportional to 5,148.74, 7,105.31 and 2,790.87 is: 3,851.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,148.74 : 7,105.31 = 2,790.87 : x
  2. Step 2: Convert to fraction form
    5,148.74/7,105.31 = 2,790.87/x
  3. Step 3: Cross multiply
    5,148.74x = 7,105.31 × 2,790.87
  4. Step 4: Simplify right side
    5,148.74x = 19,829,982.57
  5. Step 5: Solve for x
    x = 19,829,982.57/5,148.74
  6. Step 6: Final answer
    x = 3,851.43

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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.