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Finding the Fourth Proportional to 8,612.17, 11,879.15 and 6,218.20

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Solution

The fourth proportional to 8,612.17, 11,879.15 and 6,218.20 is: 8,577.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.17 : 11,879.15 = 6,218.20 : x
  2. Step 2: Convert to fraction form
    8,612.17/11,879.15 = 6,218.20/x
  3. Step 3: Cross multiply
    8,612.17x = 11,879.15 × 6,218.20
  4. Step 4: Simplify right side
    8,612.17x = 73,866,893.06
  5. Step 5: Solve for x
    x = 73,866,893.06/8,612.17
  6. Step 6: Final answer
    x = 8,577.04

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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.