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Finding the Fourth Proportional to 26,783.80, 40,218.90 and 19,439.80

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Solution

The fourth proportional to 26,783.80, 40,218.90 and 19,439.80 is: 29,191.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,783.80 : 40,218.90 = 19,439.80 : x
  2. Step 2: Convert to fraction form
    26,783.80/40,218.90 = 19,439.80/x
  3. Step 3: Cross multiply
    26,783.80x = 40,218.90 × 19,439.80
  4. Step 4: Simplify right side
    26,783.80x = 781,847,372.22
  5. Step 5: Solve for x
    x = 781,847,372.22/26,783.80
  6. Step 6: Final answer
    x = 29,191.05

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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.