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Finding the Fourth Proportional to 11,874.60, 17,811.90 and 8,173.10

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Solution

The fourth proportional to 11,874.60, 17,811.90 and 8,173.10 is: 12,259.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,874.60 : 17,811.90 = 8,173.10 : x
  2. Step 2: Convert to fraction form
    11,874.60/17,811.90 = 8,173.10/x
  3. Step 3: Cross multiply
    11,874.60x = 17,811.90 × 8,173.10
  4. Step 4: Simplify right side
    11,874.60x = 145,578,484.42
  5. Step 5: Solve for x
    x = 145,578,484.42/11,874.60
  6. Step 6: Final answer
    x = 12,259.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.