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Finding the Fourth Proportional to 11,961.64, 16,508.76 and 7,181.80

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Solution

The fourth proportional to 11,961.64, 16,508.76 and 7,181.80 is: 9,911.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,961.64 : 16,508.76 = 7,181.80 : x
  2. Step 2: Convert to fraction form
    11,961.64/16,508.76 = 7,181.80/x
  3. Step 3: Cross multiply
    11,961.64x = 16,508.76 × 7,181.80
  4. Step 4: Simplify right side
    11,961.64x = 118,562,612.57
  5. Step 5: Solve for x
    x = 118,562,612.57/11,961.64
  6. Step 6: Final answer
    x = 9,911.90

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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.