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Finding the Fourth Proportional to 8,647.17, 11,917.31 and 6,285.21

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Solution

The fourth proportional to 8,647.17, 11,917.31 and 6,285.21 is: 8,662.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,647.17 : 11,917.31 = 6,285.21 : x
  2. Step 2: Convert to fraction form
    8,647.17/11,917.31 = 6,285.21/x
  3. Step 3: Cross multiply
    8,647.17x = 11,917.31 × 6,285.21
  4. Step 4: Simplify right side
    8,647.17x = 74,902,764.56
  5. Step 5: Solve for x
    x = 74,902,764.56/8,647.17
  6. Step 6: Final answer
    x = 8,662.11

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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.