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Finding the Fourth Proportional to 57,789.72, 86,696.84 and 20,348.28

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Solution

The fourth proportional to 57,789.72, 86,696.84 and 20,348.28 is: 30,526.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,789.72 : 86,696.84 = 20,348.28 : x
  2. Step 2: Convert to fraction form
    57,789.72/86,696.84 = 20,348.28/x
  3. Step 3: Cross multiply
    57,789.72x = 86,696.84 × 20,348.28
  4. Step 4: Simplify right side
    57,789.72x = 1,764,131,575.44
  5. Step 5: Solve for x
    x = 1,764,131,575.44/57,789.72
  6. Step 6: Final answer
    x = 30,526.74

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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.