Home / 20,765.85-28,656.57-11,333.79

Finding the Fourth Proportional to 20,765.85, 28,656.57 and 11,333.79

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Solution

The fourth proportional to 20,765.85, 28,656.57 and 11,333.79 is: 15,640.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.85 : 28,656.57 = 11,333.79 : x
  2. Step 2: Convert to fraction form
    20,765.85/28,656.57 = 11,333.79/x
  3. Step 3: Cross multiply
    20,765.85x = 28,656.57 × 11,333.79
  4. Step 4: Simplify right side
    20,765.85x = 324,787,546.50
  5. Step 5: Solve for x
    x = 324,787,546.50/20,765.85
  6. Step 6: Final answer
    x = 15,640.46

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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.