Home / 12,489.80-17,227.76-8,006.45

Finding the Fourth Proportional to 12,489.80, 17,227.76 and 8,006.45

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Solution

The fourth proportional to 12,489.80, 17,227.76 and 8,006.45 is: 11,043.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.80 : 17,227.76 = 8,006.45 : x
  2. Step 2: Convert to fraction form
    12,489.80/17,227.76 = 8,006.45/x
  3. Step 3: Cross multiply
    12,489.80x = 17,227.76 × 8,006.45
  4. Step 4: Simplify right side
    12,489.80x = 137,933,072.88
  5. Step 5: Solve for x
    x = 137,933,072.88/12,489.80
  6. Step 6: Final answer
    x = 11,043.66

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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.