Home / 12,191.20-16,812.30-8,408.32

Finding the Fourth Proportional to 12,191.20, 16,812.30 and 8,408.32

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Solution

The fourth proportional to 12,191.20, 16,812.30 and 8,408.32 is: 11,595.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,191.20 : 16,812.30 = 8,408.32 : x
  2. Step 2: Convert to fraction form
    12,191.20/16,812.30 = 8,408.32/x
  3. Step 3: Cross multiply
    12,191.20x = 16,812.30 × 8,408.32
  4. Step 4: Simplify right side
    12,191.20x = 141,363,198.34
  5. Step 5: Solve for x
    x = 141,363,198.34/12,191.20
  6. Step 6: Final answer
    x = 11,595.51

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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.