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Finding the Fourth Proportional to 17,881.12, 24,680.80 and 11,910.60

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Solution

The fourth proportional to 17,881.12, 24,680.80 and 11,910.60 is: 16,439.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,881.12 : 24,680.80 = 11,910.60 : x
  2. Step 2: Convert to fraction form
    17,881.12/24,680.80 = 11,910.60/x
  3. Step 3: Cross multiply
    17,881.12x = 24,680.80 × 11,910.60
  4. Step 4: Simplify right side
    17,881.12x = 293,963,136.48
  5. Step 5: Solve for x
    x = 293,963,136.48/17,881.12
  6. Step 6: Final answer
    x = 16,439.86

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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.