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Finding the Fourth Proportional to 11,659.40, 17,489.10 and 11,205.80

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Solution

The fourth proportional to 11,659.40, 17,489.10 and 11,205.80 is: 16,808.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,659.40 : 17,489.10 = 11,205.80 : x
  2. Step 2: Convert to fraction form
    11,659.40/17,489.10 = 11,205.80/x
  3. Step 3: Cross multiply
    11,659.40x = 17,489.10 × 11,205.80
  4. Step 4: Simplify right side
    11,659.40x = 195,979,356.78
  5. Step 5: Solve for x
    x = 195,979,356.78/11,659.40
  6. Step 6: Final answer
    x = 16,808.70

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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.