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Finding the Fourth Proportional to 39,855.87, 59,731.83 and 20,123.73

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Solution

The fourth proportional to 39,855.87, 59,731.83 and 20,123.73 is: 30,159.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,855.87 : 59,731.83 = 20,123.73 : x
  2. Step 2: Convert to fraction form
    39,855.87/59,731.83 = 20,123.73/x
  3. Step 3: Cross multiply
    39,855.87x = 59,731.83 × 20,123.73
  4. Step 4: Simplify right side
    39,855.87x = 1,202,027,219.33
  5. Step 5: Solve for x
    x = 1,202,027,219.33/39,855.87
  6. Step 6: Final answer
    x = 30,159.35

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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.