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Finding the Fourth Proportional to 12,651.20, 17,476.80 and 12,132.80

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Solution

The fourth proportional to 12,651.20, 17,476.80 and 12,132.80 is: 16,760.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.20 : 17,476.80 = 12,132.80 : x
  2. Step 2: Convert to fraction form
    12,651.20/17,476.80 = 12,132.80/x
  3. Step 3: Cross multiply
    12,651.20x = 17,476.80 × 12,132.80
  4. Step 4: Simplify right side
    12,651.20x = 212,042,519.04
  5. Step 5: Solve for x
    x = 212,042,519.04/12,651.20
  6. Step 6: Final answer
    x = 16,760.66

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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.