Home / 13,286.63-18,336.38-7,318.30

Finding the Fourth Proportional to 13,286.63, 18,336.38 and 7,318.30

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Solution

The fourth proportional to 13,286.63, 18,336.38 and 7,318.30 is: 10,099.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286.63 : 18,336.38 = 7,318.30 : x
  2. Step 2: Convert to fraction form
    13,286.63/18,336.38 = 7,318.30/x
  3. Step 3: Cross multiply
    13,286.63x = 18,336.38 × 7,318.30
  4. Step 4: Simplify right side
    13,286.63x = 134,191,001.48
  5. Step 5: Solve for x
    x = 134,191,001.48/13,286.63
  6. Step 6: Final answer
    x = 10,099.71

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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.