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Finding the Fourth Proportional to 5,199.17, 7,128.39 and 5,105.54

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Solution

The fourth proportional to 5,199.17, 7,128.39 and 5,105.54 is: 7,000.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,199.17 : 7,128.39 = 5,105.54 : x
  2. Step 2: Convert to fraction form
    5,199.17/7,128.39 = 5,105.54/x
  3. Step 3: Cross multiply
    5,199.17x = 7,128.39 × 5,105.54
  4. Step 4: Simplify right side
    5,199.17x = 36,394,317.25
  5. Step 5: Solve for x
    x = 36,394,317.25/5,199.17
  6. Step 6: Final answer
    x = 7,000.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.