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Finding the Fourth Proportional to 39,991.80, 60,009.30 and 16,620.60

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Solution

The fourth proportional to 39,991.80, 60,009.30 and 16,620.60 is: 24,939.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,991.80 : 60,009.30 = 16,620.60 : x
  2. Step 2: Convert to fraction form
    39,991.80/60,009.30 = 16,620.60/x
  3. Step 3: Cross multiply
    39,991.80x = 60,009.30 × 16,620.60
  4. Step 4: Simplify right side
    39,991.80x = 997,390,571.58
  5. Step 5: Solve for x
    x = 997,390,571.58/39,991.80
  6. Step 6: Final answer
    x = 24,939.88

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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.