Home / 13,286.50-18,336.20-7,318.17

Finding the Fourth Proportional to 13,286.50, 18,336.20 and 7,318.17

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Solution

The fourth proportional to 13,286.50, 18,336.20 and 7,318.17 is: 10,099.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286.50 : 18,336.20 = 7,318.17 : x
  2. Step 2: Convert to fraction form
    13,286.50/18,336.20 = 7,318.17/x
  3. Step 3: Cross multiply
    13,286.50x = 18,336.20 × 7,318.17
  4. Step 4: Simplify right side
    13,286.50x = 134,187,337.07
  5. Step 5: Solve for x
    x = 134,187,337.07/13,286.50
  6. Step 6: Final answer
    x = 10,099.52

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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.