Home / 12,129.82-16,730.20-8,354.19

Finding the Fourth Proportional to 12,129.82, 16,730.20 and 8,354.19

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Solution

The fourth proportional to 12,129.82, 16,730.20 and 8,354.19 is: 11,522.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.82 : 16,730.20 = 8,354.19 : x
  2. Step 2: Convert to fraction form
    12,129.82/16,730.20 = 8,354.19/x
  3. Step 3: Cross multiply
    12,129.82x = 16,730.20 × 8,354.19
  4. Step 4: Simplify right side
    12,129.82x = 139,767,144.12
  5. Step 5: Solve for x
    x = 139,767,144.12/12,129.82
  6. Step 6: Final answer
    x = 11,522.61

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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.