Home / 13,286.13-18,334.64-7,318.36

Finding the Fourth Proportional to 13,286.13, 18,334.64 and 7,318.36

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Solution

The fourth proportional to 13,286.13, 18,334.64 and 7,318.36 is: 10,099.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286.13 : 18,334.64 = 7,318.36 : x
  2. Step 2: Convert to fraction form
    13,286.13/18,334.64 = 7,318.36/x
  3. Step 3: Cross multiply
    13,286.13x = 18,334.64 × 7,318.36
  4. Step 4: Simplify right side
    13,286.13x = 134,179,367.73
  5. Step 5: Solve for x
    x = 134,179,367.73/13,286.13
  6. Step 6: Final answer
    x = 10,099.21

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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.