Home / 20,865.34-28,793.55-11,912.59

Finding the Fourth Proportional to 20,865.34, 28,793.55 and 11,912.59

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Solution

The fourth proportional to 20,865.34, 28,793.55 and 11,912.59 is: 16,439.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.34 : 28,793.55 = 11,912.59 : x
  2. Step 2: Convert to fraction form
    20,865.34/28,793.55 = 11,912.59/x
  3. Step 3: Cross multiply
    20,865.34x = 28,793.55 × 11,912.59
  4. Step 4: Simplify right side
    20,865.34x = 343,005,755.79
  5. Step 5: Solve for x
    x = 343,005,755.79/20,865.34
  6. Step 6: Final answer
    x = 16,439.02

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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.