Home / 20,103.85-30,155.85-8,408.87

Finding the Fourth Proportional to 20,103.85, 30,155.85 and 8,408.87

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Solution

The fourth proportional to 20,103.85, 30,155.85 and 8,408.87 is: 12,613.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,103.85 : 30,155.85 = 8,408.87 : x
  2. Step 2: Convert to fraction form
    20,103.85/30,155.85 = 8,408.87/x
  3. Step 3: Cross multiply
    20,103.85x = 30,155.85 × 8,408.87
  4. Step 4: Simplify right side
    20,103.85x = 253,576,492.63
  5. Step 5: Solve for x
    x = 253,576,492.63/20,103.85
  6. Step 6: Final answer
    x = 12,613.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.