Home / 20,770.64-28,665.15-11,820.86

Finding the Fourth Proportional to 20,770.64, 28,665.15 and 11,820.86

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Solution

The fourth proportional to 20,770.64, 28,665.15 and 11,820.86 is: 16,313.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.64 : 28,665.15 = 11,820.86 : x
  2. Step 2: Convert to fraction form
    20,770.64/28,665.15 = 11,820.86/x
  3. Step 3: Cross multiply
    20,770.64x = 28,665.15 × 11,820.86
  4. Step 4: Simplify right side
    20,770.64x = 338,846,725.03
  5. Step 5: Solve for x
    x = 338,846,725.03/20,770.64
  6. Step 6: Final answer
    x = 16,313.74

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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.