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Finding the Fourth Proportional to 39,811.60, 59,724.60 and 20,040.40

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Solution

The fourth proportional to 39,811.60, 59,724.60 and 20,040.40 is: 30,064.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,811.60 : 59,724.60 = 20,040.40 : x
  2. Step 2: Convert to fraction form
    39,811.60/59,724.60 = 20,040.40/x
  3. Step 3: Cross multiply
    39,811.60x = 59,724.60 × 20,040.40
  4. Step 4: Simplify right side
    39,811.60x = 1,196,904,873.84
  5. Step 5: Solve for x
    x = 1,196,904,873.84/39,811.60
  6. Step 6: Final answer
    x = 30,064.22

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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.