Home / 20,865.48-28,797.12-11,910.96

Finding the Fourth Proportional to 20,865.48, 28,797.12 and 11,910.96

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Solution

The fourth proportional to 20,865.48, 28,797.12 and 11,910.96 is: 16,438.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.48 : 28,797.12 = 11,910.96 : x
  2. Step 2: Convert to fraction form
    20,865.48/28,797.12 = 11,910.96/x
  3. Step 3: Cross multiply
    20,865.48x = 28,797.12 × 11,910.96
  4. Step 4: Simplify right side
    20,865.48x = 343,001,344.44
  5. Step 5: Solve for x
    x = 343,001,344.44/20,865.48
  6. Step 6: Final answer
    x = 16,438.70

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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.