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Finding the Fourth Proportional to 7,175.67, 9,900.27 and 4,189.47

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Solution

The fourth proportional to 7,175.67, 9,900.27 and 4,189.47 is: 5,780.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,175.67 : 9,900.27 = 4,189.47 : x
  2. Step 2: Convert to fraction form
    7,175.67/9,900.27 = 4,189.47/x
  3. Step 3: Cross multiply
    7,175.67x = 9,900.27 × 4,189.47
  4. Step 4: Simplify right side
    7,175.67x = 41,476,884.16
  5. Step 5: Solve for x
    x = 41,476,884.16/7,175.67
  6. Step 6: Final answer
    x = 5,780.21

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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.