Home / 12,129.02-16,742.72-8,161.44

Finding the Fourth Proportional to 12,129.02, 16,742.72 and 8,161.44

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Solution

The fourth proportional to 12,129.02, 16,742.72 and 8,161.44 is: 11,265.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.02 : 16,742.72 = 8,161.44 : x
  2. Step 2: Convert to fraction form
    12,129.02/16,742.72 = 8,161.44/x
  3. Step 3: Cross multiply
    12,129.02x = 16,742.72 × 8,161.44
  4. Step 4: Simplify right side
    12,129.02x = 136,644,704.72
  5. Step 5: Solve for x
    x = 136,644,704.72/12,129.02
  6. Step 6: Final answer
    x = 11,265.93

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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.