Home / 5,645.93-7,791.17-3,128.15

Finding the Fourth Proportional to 5,645.93, 7,791.17 and 3,128.15

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Solution

The fourth proportional to 5,645.93, 7,791.17 and 3,128.15 is: 4,316.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,645.93 : 7,791.17 = 3,128.15 : x
  2. Step 2: Convert to fraction form
    5,645.93/7,791.17 = 3,128.15/x
  3. Step 3: Cross multiply
    5,645.93x = 7,791.17 × 3,128.15
  4. Step 4: Simplify right side
    5,645.93x = 24,371,948.44
  5. Step 5: Solve for x
    x = 24,371,948.44/5,645.93
  6. Step 6: Final answer
    x = 4,316.73

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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.