Home / 20,765.28-28,656.14-11,333.85

Finding the Fourth Proportional to 20,765.28, 28,656.14 and 11,333.85

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Solution

The fourth proportional to 20,765.28, 28,656.14 and 11,333.85 is: 15,640.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.28 : 28,656.14 = 11,333.85 : x
  2. Step 2: Convert to fraction form
    20,765.28/28,656.14 = 11,333.85/x
  3. Step 3: Cross multiply
    20,765.28x = 28,656.14 × 11,333.85
  4. Step 4: Simplify right side
    20,765.28x = 324,784,392.34
  5. Step 5: Solve for x
    x = 324,784,392.34/20,765.28
  6. Step 6: Final answer
    x = 15,640.74

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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.