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Finding the Fourth Proportional to 39,942.80, 59,905.80 and 20,202.80

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Solution

The fourth proportional to 39,942.80, 59,905.80 and 20,202.80 is: 30,299.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,942.80 : 59,905.80 = 20,202.80 : x
  2. Step 2: Convert to fraction form
    39,942.80/59,905.80 = 20,202.80/x
  3. Step 3: Cross multiply
    39,942.80x = 59,905.80 × 20,202.80
  4. Step 4: Simplify right side
    39,942.80x = 1,210,264,896.24
  5. Step 5: Solve for x
    x = 1,210,264,896.24/39,942.80
  6. Step 6: Final answer
    x = 30,299.95

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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.