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Finding the Fourth Proportional to 11,988.42, 17,988.71 and 8,084.63

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Solution

The fourth proportional to 11,988.42, 17,988.71 and 8,084.63 is: 12,131.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,988.42 : 17,988.71 = 8,084.63 : x
  2. Step 2: Convert to fraction form
    11,988.42/17,988.71 = 8,084.63/x
  3. Step 3: Cross multiply
    11,988.42x = 17,988.71 × 8,084.63
  4. Step 4: Simplify right side
    11,988.42x = 145,431,994.80
  5. Step 5: Solve for x
    x = 145,431,994.80/11,988.42
  6. Step 6: Final answer
    x = 12,131.04

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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.