Home / 12,128.21-18,202.05-6,286.49

Finding the Fourth Proportional to 12,128.21, 18,202.05 and 6,286.49

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Solution

The fourth proportional to 12,128.21, 18,202.05 and 6,286.49 is: 9,434.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.21 : 18,202.05 = 6,286.49 : x
  2. Step 2: Convert to fraction form
    12,128.21/18,202.05 = 6,286.49/x
  3. Step 3: Cross multiply
    12,128.21x = 18,202.05 × 6,286.49
  4. Step 4: Simplify right side
    12,128.21x = 114,426,914.29
  5. Step 5: Solve for x
    x = 114,426,914.29/12,128.21
  6. Step 6: Final answer
    x = 9,434.78

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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.