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Finding the Fourth Proportional to 8,612.13, 12,918.20 and 2,456.13

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Solution

The fourth proportional to 8,612.13, 12,918.20 and 2,456.13 is: 3,684.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.13 : 12,918.20 = 2,456.13 : x
  2. Step 2: Convert to fraction form
    8,612.13/12,918.20 = 2,456.13/x
  3. Step 3: Cross multiply
    8,612.13x = 12,918.20 × 2,456.13
  4. Step 4: Simplify right side
    8,612.13x = 31,728,778.57
  5. Step 5: Solve for x
    x = 31,728,778.57/8,612.13
  6. Step 6: Final answer
    x = 3,684.20

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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.