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Finding the Fourth Proportional to 57,811.80, 86,717.70 and 18,372.90

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Solution

The fourth proportional to 57,811.80, 86,717.70 and 18,372.90 is: 27,559.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,811.80 : 86,717.70 = 18,372.90 : x
  2. Step 2: Convert to fraction form
    57,811.80/86,717.70 = 18,372.90/x
  3. Step 3: Cross multiply
    57,811.80x = 86,717.70 × 18,372.90
  4. Step 4: Simplify right side
    57,811.80x = 1,593,255,630.33
  5. Step 5: Solve for x
    x = 1,593,255,630.33/57,811.80
  6. Step 6: Final answer
    x = 27,559.35

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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.