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Finding the Fourth Proportional to 39,991.41, 59,951.43 and 20,259.81

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Solution

The fourth proportional to 39,991.41, 59,951.43 and 20,259.81 is: 30,371.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,991.41 : 59,951.43 = 20,259.81 : x
  2. Step 2: Convert to fraction form
    39,991.41/59,951.43 = 20,259.81/x
  3. Step 3: Cross multiply
    39,991.41x = 59,951.43 × 20,259.81
  4. Step 4: Simplify right side
    39,991.41x = 1,214,604,581.03
  5. Step 5: Solve for x
    x = 1,214,604,581.03/39,991.41
  6. Step 6: Final answer
    x = 30,371.64

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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.