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Finding the Fourth Proportional to 17,740.80, 26,611.20 and 11,865.60

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Solution

The fourth proportional to 17,740.80, 26,611.20 and 11,865.60 is: 17,798.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,740.80 : 26,611.20 = 11,865.60 : x
  2. Step 2: Convert to fraction form
    17,740.80/26,611.20 = 11,865.60/x
  3. Step 3: Cross multiply
    17,740.80x = 26,611.20 × 11,865.60
  4. Step 4: Simplify right side
    17,740.80x = 315,757,854.72
  5. Step 5: Solve for x
    x = 315,757,854.72/17,740.80
  6. Step 6: Final answer
    x = 17,798.40

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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.