Home / 18,287.14-27,430.70-5,139.22

Finding the Fourth Proportional to 18,287.14, 27,430.70 and 5,139.22

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Solution

The fourth proportional to 18,287.14, 27,430.70 and 5,139.22 is: 7,708.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,287.14 : 27,430.70 = 5,139.22 : x
  2. Step 2: Convert to fraction form
    18,287.14/27,430.70 = 5,139.22/x
  3. Step 3: Cross multiply
    18,287.14x = 27,430.70 × 5,139.22
  4. Step 4: Simplify right side
    18,287.14x = 140,972,402.05
  5. Step 5: Solve for x
    x = 140,972,402.05/18,287.14
  6. Step 6: Final answer
    x = 7,708.83

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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.