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Finding the Fourth Proportional to 8,612.15, 12,917.93 and 2,456.15

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Solution

The fourth proportional to 8,612.15, 12,917.93 and 2,456.15 is: 3,684.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.15 : 12,917.93 = 2,456.15 : x
  2. Step 2: Convert to fraction form
    8,612.15/12,917.93 = 2,456.15/x
  3. Step 3: Cross multiply
    8,612.15x = 12,917.93 × 2,456.15
  4. Step 4: Simplify right side
    8,612.15x = 31,728,296.90
  5. Step 5: Solve for x
    x = 31,728,296.90/8,612.15
  6. Step 6: Final answer
    x = 3,684.13

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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.