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Finding the Fourth Proportional to 39,990.80, 59,912.40 and 23,358.80

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Solution

The fourth proportional to 39,990.80, 59,912.40 and 23,358.80 is: 34,995.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,990.80 : 59,912.40 = 23,358.80 : x
  2. Step 2: Convert to fraction form
    39,990.80/59,912.40 = 23,358.80/x
  3. Step 3: Cross multiply
    39,990.80x = 59,912.40 × 23,358.80
  4. Step 4: Simplify right side
    39,990.80x = 1,399,481,769.12
  5. Step 5: Solve for x
    x = 1,399,481,769.12/39,990.80
  6. Step 6: Final answer
    x = 34,995.09

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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.