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Finding the Fourth Proportional to 11,971.92, 16,520.94 and 6,666.62

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Solution

The fourth proportional to 11,971.92, 16,520.94 and 6,666.62 is: 9,199.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,971.92 : 16,520.94 = 6,666.62 : x
  2. Step 2: Convert to fraction form
    11,971.92/16,520.94 = 6,666.62/x
  3. Step 3: Cross multiply
    11,971.92x = 16,520.94 × 6,666.62
  4. Step 4: Simplify right side
    11,971.92x = 110,138,829.02
  5. Step 5: Solve for x
    x = 110,138,829.02/11,971.92
  6. Step 6: Final answer
    x = 9,199.76

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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.