Home / 12,159.38-18,238.12-3,839.64

Finding the Fourth Proportional to 12,159.38, 18,238.12 and 3,839.64

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Solution

The fourth proportional to 12,159.38, 18,238.12 and 3,839.64 is: 5,759.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.38 : 18,238.12 = 3,839.64 : x
  2. Step 2: Convert to fraction form
    12,159.38/18,238.12 = 3,839.64/x
  3. Step 3: Cross multiply
    12,159.38x = 18,238.12 × 3,839.64
  4. Step 4: Simplify right side
    12,159.38x = 70,027,795.88
  5. Step 5: Solve for x
    x = 70,027,795.88/12,159.38
  6. Step 6: Final answer
    x = 5,759.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.