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Finding the Fourth Proportional to 12,425.66, 18,638.49 and 8,518.22

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Solution

The fourth proportional to 12,425.66, 18,638.49 and 8,518.22 is: 12,777.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.66 : 18,638.49 = 8,518.22 : x
  2. Step 2: Convert to fraction form
    12,425.66/18,638.49 = 8,518.22/x
  3. Step 3: Cross multiply
    12,425.66x = 18,638.49 × 8,518.22
  4. Step 4: Simplify right side
    12,425.66x = 158,766,758.29
  5. Step 5: Solve for x
    x = 158,766,758.29/12,425.66
  6. Step 6: Final answer
    x = 12,777.33

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Similar ratio
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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.