Home / 13,286.88-18,336.11-7,318.49

Finding the Fourth Proportional to 13,286.88, 18,336.11 and 7,318.49

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Solution

The fourth proportional to 13,286.88, 18,336.11 and 7,318.49 is: 10,099.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286.88 : 18,336.11 = 7,318.49 : x
  2. Step 2: Convert to fraction form
    13,286.88/18,336.11 = 7,318.49/x
  3. Step 3: Cross multiply
    13,286.88x = 18,336.11 × 7,318.49
  4. Step 4: Simplify right side
    13,286.88x = 134,192,509.40
  5. Step 5: Solve for x
    x = 134,192,509.40/13,286.88
  6. Step 6: Final answer
    x = 10,099.63

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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.