Home / 7,145.11-9,860.03-3,958.28

Finding the Fourth Proportional to 7,145.11, 9,860.03 and 3,958.28

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Solution

The fourth proportional to 7,145.11, 9,860.03 and 3,958.28 is: 5,462.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.11 : 9,860.03 = 3,958.28 : x
  2. Step 2: Convert to fraction form
    7,145.11/9,860.03 = 3,958.28/x
  3. Step 3: Cross multiply
    7,145.11x = 9,860.03 × 3,958.28
  4. Step 4: Simplify right side
    7,145.11x = 39,028,759.55
  5. Step 5: Solve for x
    x = 39,028,759.55/7,145.11
  6. Step 6: Final answer
    x = 5,462.30

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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.