Home / 20,742.92-28,625.12-11,311.28

Finding the Fourth Proportional to 20,742.92, 28,625.12 and 11,311.28

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Solution

The fourth proportional to 20,742.92, 28,625.12 and 11,311.28 is: 15,609.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.92 : 28,625.12 = 11,311.28 : x
  2. Step 2: Convert to fraction form
    20,742.92/28,625.12 = 11,311.28/x
  3. Step 3: Cross multiply
    20,742.92x = 28,625.12 × 11,311.28
  4. Step 4: Simplify right side
    20,742.92x = 323,786,747.35
  5. Step 5: Solve for x
    x = 323,786,747.35/20,742.92
  6. Step 6: Final answer
    x = 15,609.51

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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.