Home / 5,148.72-7,105.21-2,790.85

Finding the Fourth Proportional to 5,148.72, 7,105.21 and 2,790.85

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Solution

The fourth proportional to 5,148.72, 7,105.21 and 2,790.85 is: 3,851.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,148.72 : 7,105.21 = 2,790.85 : x
  2. Step 2: Convert to fraction form
    5,148.72/7,105.21 = 2,790.85/x
  3. Step 3: Cross multiply
    5,148.72x = 7,105.21 × 2,790.85
  4. Step 4: Simplify right side
    5,148.72x = 19,829,575.33
  5. Step 5: Solve for x
    x = 19,829,575.33/5,148.72
  6. Step 6: Final answer
    x = 3,851.36

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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.