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Finding the Fourth Proportional to 12,668.68, 17,488.89 and 8,426.80

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Solution

The fourth proportional to 12,668.68, 17,488.89 and 8,426.80 is: 11,633.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,668.68 : 17,488.89 = 8,426.80 : x
  2. Step 2: Convert to fraction form
    12,668.68/17,488.89 = 8,426.80/x
  3. Step 3: Cross multiply
    12,668.68x = 17,488.89 × 8,426.80
  4. Step 4: Simplify right side
    12,668.68x = 147,375,378.25
  5. Step 5: Solve for x
    x = 147,375,378.25/12,668.68
  6. Step 6: Final answer
    x = 11,633.05

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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.