Home / 7,147.21-9,863.18-4,165.09

Finding the Fourth Proportional to 7,147.21, 9,863.18 and 4,165.09

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Solution

The fourth proportional to 7,147.21, 9,863.18 and 4,165.09 is: 5,747.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,147.21 : 9,863.18 = 4,165.09 : x
  2. Step 2: Convert to fraction form
    7,147.21/9,863.18 = 4,165.09/x
  3. Step 3: Cross multiply
    7,147.21x = 9,863.18 × 4,165.09
  4. Step 4: Simplify right side
    7,147.21x = 41,081,032.39
  5. Step 5: Solve for x
    x = 41,081,032.39/7,147.21
  6. Step 6: Final answer
    x = 5,747.84

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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.