Home / 18,220.05-27,308.13-7,686

Finding the Fourth Proportional to 18,220.05, 27,308.13 and 7,686

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Solution

The fourth proportional to 18,220.05, 27,308.13 and 7,686 is: 11,519.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.05 : 27,308.13 = 7,686 : x
  2. Step 2: Convert to fraction form
    18,220.05/27,308.13 = 7,686/x
  3. Step 3: Cross multiply
    18,220.05x = 27,308.13 × 7,686
  4. Step 4: Simplify right side
    18,220.05x = 209,890,287.18
  5. Step 5: Solve for x
    x = 209,890,287.18/18,220.05
  6. Step 6: Final answer
    x = 11,519.74

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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.