Home / 20,918.62-28,850.73-18,395.38

Finding the Fourth Proportional to 20,918.62, 28,850.73 and 18,395.38

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Solution

The fourth proportional to 20,918.62, 28,850.73 and 18,395.38 is: 25,370.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.62 : 28,850.73 = 18,395.38 : x
  2. Step 2: Convert to fraction form
    20,918.62/28,850.73 = 18,395.38/x
  3. Step 3: Cross multiply
    20,918.62x = 28,850.73 × 18,395.38
  4. Step 4: Simplify right side
    20,918.62x = 530,720,141.63
  5. Step 5: Solve for x
    x = 530,720,141.63/20,918.62
  6. Step 6: Final answer
    x = 25,370.71

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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.