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Finding the Fourth Proportional to 12,679.68, 17,502.36 and 8,713.92

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Solution

The fourth proportional to 12,679.68, 17,502.36 and 8,713.92 is: 12,028.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.68 : 17,502.36 = 8,713.92 : x
  2. Step 2: Convert to fraction form
    12,679.68/17,502.36 = 8,713.92/x
  3. Step 3: Cross multiply
    12,679.68x = 17,502.36 × 8,713.92
  4. Step 4: Simplify right side
    12,679.68x = 152,514,164.85
  5. Step 5: Solve for x
    x = 152,514,164.85/12,679.68
  6. Step 6: Final answer
    x = 12,028.23

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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.