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Finding the Fourth Proportional to 18,415.97, 27,628.58 and 7,318.97

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Solution

The fourth proportional to 18,415.97, 27,628.58 and 7,318.97 is: 10,980.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,415.97 : 27,628.58 = 7,318.97 : x
  2. Step 2: Convert to fraction form
    18,415.97/27,628.58 = 7,318.97/x
  3. Step 3: Cross multiply
    18,415.97x = 27,628.58 × 7,318.97
  4. Step 4: Simplify right side
    18,415.97x = 202,212,628.32
  5. Step 5: Solve for x
    x = 202,212,628.32/18,415.97
  6. Step 6: Final answer
    x = 10,980.29

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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.