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Finding the Fourth Proportional to 57,686.80, 86,539.20 and 18,240.16

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Solution

The fourth proportional to 57,686.80, 86,539.20 and 18,240.16 is: 27,363.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,686.80 : 86,539.20 = 18,240.16 : x
  2. Step 2: Convert to fraction form
    57,686.80/86,539.20 = 18,240.16/x
  3. Step 3: Cross multiply
    57,686.80x = 86,539.20 × 18,240.16
  4. Step 4: Simplify right side
    57,686.80x = 1,578,488,854.27
  5. Step 5: Solve for x
    x = 1,578,488,854.27/57,686.80
  6. Step 6: Final answer
    x = 27,363.09

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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.