Home / 20,078.67-27,708.75-11,126.28

Finding the Fourth Proportional to 20,078.67, 27,708.75 and 11,126.28

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Solution

The fourth proportional to 20,078.67, 27,708.75 and 11,126.28 is: 15,354.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.67 : 27,708.75 = 11,126.28 : x
  2. Step 2: Convert to fraction form
    20,078.67/27,708.75 = 11,126.28/x
  3. Step 3: Cross multiply
    20,078.67x = 27,708.75 × 11,126.28
  4. Step 4: Simplify right side
    20,078.67x = 308,295,310.95
  5. Step 5: Solve for x
    x = 308,295,310.95/20,078.67
  6. Step 6: Final answer
    x = 15,354.37

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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.