Home / 8,151.21-11,255.56-5,172.33

Finding the Fourth Proportional to 8,151.21, 11,255.56 and 5,172.33

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Solution

The fourth proportional to 8,151.21, 11,255.56 and 5,172.33 is: 7,142.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,151.21 : 11,255.56 = 5,172.33 : x
  2. Step 2: Convert to fraction form
    8,151.21/11,255.56 = 5,172.33/x
  3. Step 3: Cross multiply
    8,151.21x = 11,255.56 × 5,172.33
  4. Step 4: Simplify right side
    8,151.21x = 58,217,414.38
  5. Step 5: Solve for x
    x = 58,217,414.38/8,151.21
  6. Step 6: Final answer
    x = 7,142.19

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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.