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Finding the Fourth Proportional to 57,965.28, 86,930.64 and 18,520.80

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Solution

The fourth proportional to 57,965.28, 86,930.64 and 18,520.80 is: 27,775.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,965.28 : 86,930.64 = 18,520.80 : x
  2. Step 2: Convert to fraction form
    57,965.28/86,930.64 = 18,520.80/x
  3. Step 3: Cross multiply
    57,965.28x = 86,930.64 × 18,520.80
  4. Step 4: Simplify right side
    57,965.28x = 1,610,024,997.31
  5. Step 5: Solve for x
    x = 1,610,024,997.31/57,965.28
  6. Step 6: Final answer
    x = 27,775.68

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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.