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Finding the Fourth Proportional to 57,783.40, 86,675.10 and 18,343.60

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Solution

The fourth proportional to 57,783.40, 86,675.10 and 18,343.60 is: 27,515.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,783.40 : 86,675.10 = 18,343.60 : x
  2. Step 2: Convert to fraction form
    57,783.40/86,675.10 = 18,343.60/x
  3. Step 3: Cross multiply
    57,783.40x = 86,675.10 × 18,343.60
  4. Step 4: Simplify right side
    57,783.40x = 1,589,933,364.36
  5. Step 5: Solve for x
    x = 1,589,933,364.36/57,783.40
  6. Step 6: Final answer
    x = 27,515.40

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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.