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Finding the Fourth Proportional to 17,855.80, 26,789.78 and 8,615.48

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Solution

The fourth proportional to 17,855.80, 26,789.78 and 8,615.48 is: 12,926.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,855.80 : 26,789.78 = 8,615.48 : x
  2. Step 2: Convert to fraction form
    17,855.80/26,789.78 = 8,615.48/x
  3. Step 3: Cross multiply
    17,855.80x = 26,789.78 × 8,615.48
  4. Step 4: Simplify right side
    17,855.80x = 230,806,813.79
  5. Step 5: Solve for x
    x = 230,806,813.79/17,855.80
  6. Step 6: Final answer
    x = 12,926.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.