Home / 12,161.32-16,779.64-8,120.16

Finding the Fourth Proportional to 12,161.32, 16,779.64 and 8,120.16

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Solution

The fourth proportional to 12,161.32, 16,779.64 and 8,120.16 is: 11,203.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,161.32 : 16,779.64 = 8,120.16 : x
  2. Step 2: Convert to fraction form
    12,161.32/16,779.64 = 8,120.16/x
  3. Step 3: Cross multiply
    12,161.32x = 16,779.64 × 8,120.16
  4. Step 4: Simplify right side
    12,161.32x = 136,253,361.54
  5. Step 5: Solve for x
    x = 136,253,361.54/12,161.32
  6. Step 6: Final answer
    x = 11,203.83

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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.