Home / 13,286.87-18,336.02-7,318.41

Finding the Fourth Proportional to 13,286.87, 18,336.02 and 7,318.41

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Solution

The fourth proportional to 13,286.87, 18,336.02 and 7,318.41 is: 10,099.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286.87 : 18,336.02 = 7,318.41 : x
  2. Step 2: Convert to fraction form
    13,286.87/18,336.02 = 7,318.41/x
  3. Step 3: Cross multiply
    13,286.87x = 18,336.02 × 7,318.41
  4. Step 4: Simplify right side
    13,286.87x = 134,190,530.42
  5. Step 5: Solve for x
    x = 134,190,530.42/13,286.87
  6. Step 6: Final answer
    x = 10,099.49

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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.