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Finding the Fourth Proportional to 39,964.80, 59,938.80 and 20,224.80

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Solution

The fourth proportional to 39,964.80, 59,938.80 and 20,224.80 is: 30,332.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,964.80 : 59,938.80 = 20,224.80 : x
  2. Step 2: Convert to fraction form
    39,964.80/59,938.80 = 20,224.80/x
  3. Step 3: Cross multiply
    39,964.80x = 59,938.80 × 20,224.80
  4. Step 4: Simplify right side
    39,964.80x = 1,212,250,242.24
  5. Step 5: Solve for x
    x = 1,212,250,242.24/39,964.80
  6. Step 6: Final answer
    x = 30,332.95

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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.