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Finding the Fourth Proportional to 11,917.15, 16,447.07 and 6,612.31

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Solution

The fourth proportional to 11,917.15, 16,447.07 and 6,612.31 is: 9,125.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,917.15 : 16,447.07 = 6,612.31 : x
  2. Step 2: Convert to fraction form
    11,917.15/16,447.07 = 6,612.31/x
  3. Step 3: Cross multiply
    11,917.15x = 16,447.07 × 6,612.31
  4. Step 4: Simplify right side
    11,917.15x = 108,753,162.52
  5. Step 5: Solve for x
    x = 108,753,162.52/11,917.15
  6. Step 6: Final answer
    x = 9,125.77

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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.