Home / 20,408.45-28,163.17-11,455.77

Finding the Fourth Proportional to 20,408.45, 28,163.17 and 11,455.77

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Solution

The fourth proportional to 20,408.45, 28,163.17 and 11,455.77 is: 15,808.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.45 : 28,163.17 = 11,455.77 : x
  2. Step 2: Convert to fraction form
    20,408.45/28,163.17 = 11,455.77/x
  3. Step 3: Cross multiply
    20,408.45x = 28,163.17 × 11,455.77
  4. Step 4: Simplify right side
    20,408.45x = 322,630,769.35
  5. Step 5: Solve for x
    x = 322,630,769.35/20,408.45
  6. Step 6: Final answer
    x = 15,808.69

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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.