Home / 20,755.72-28,642.88-11,324.28

Finding the Fourth Proportional to 20,755.72, 28,642.88 and 11,324.28

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Solution

The fourth proportional to 20,755.72, 28,642.88 and 11,324.28 is: 15,627.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.72 : 28,642.88 = 11,324.28 : x
  2. Step 2: Convert to fraction form
    20,755.72/28,642.88 = 11,324.28/x
  3. Step 3: Cross multiply
    20,755.72x = 28,642.88 × 11,324.28
  4. Step 4: Simplify right side
    20,755.72x = 324,359,993.13
  5. Step 5: Solve for x
    x = 324,359,993.13/20,755.72
  6. Step 6: Final answer
    x = 15,627.50

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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.