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Finding the Fourth Proportional to 18,415.59, 27,628.02 and 7,318.59

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Solution

The fourth proportional to 18,415.59, 27,628.02 and 7,318.59 is: 10,979.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,415.59 : 27,628.02 = 7,318.59 : x
  2. Step 2: Convert to fraction form
    18,415.59/27,628.02 = 7,318.59/x
  3. Step 3: Cross multiply
    18,415.59x = 27,628.02 × 7,318.59
  4. Step 4: Simplify right side
    18,415.59x = 202,198,150.89
  5. Step 5: Solve for x
    x = 202,198,150.89/18,415.59
  6. Step 6: Final answer
    x = 10,979.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.