Home / 20,408.22-28,163.64-11,455.20

Finding the Fourth Proportional to 20,408.22, 28,163.64 and 11,455.20

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Solution

The fourth proportional to 20,408.22, 28,163.64 and 11,455.20 is: 15,808.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.22 : 28,163.64 = 11,455.20 : x
  2. Step 2: Convert to fraction form
    20,408.22/28,163.64 = 11,455.20/x
  3. Step 3: Cross multiply
    20,408.22x = 28,163.64 × 11,455.20
  4. Step 4: Simplify right side
    20,408.22x = 322,620,128.93
  5. Step 5: Solve for x
    x = 322,620,128.93/20,408.22
  6. Step 6: Final answer
    x = 15,808.34

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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.